🏛️ Legacy IAS – Bangalore
Agro-Climatic Zones of India
Comprehensive UPSC Study Material with All 15 Zones, Current Affairs, PYQs & Practice MCQs
1. What are Agro-Climatic Zones?
An Agro-Climatic Zone (ACZ) is a land unit defined by its major climate — primarily rainfall, temperature, and humidity — superimposed on the length of growing period or moisture availability. India has been divided into 15 major agro-climatic zones for targeted agricultural planning and development.
15
Major Agro-Climatic Zones
72
Sub-Zones (Sub-regions)
1989
Year of Classification
20
Agro-Ecological Regions (ICAR)
329 M ha
Total Geographical Area Covered
NRSA
Partner Agency (Planning Commission)
Key Definition: An Agro-Climatic Zone is a land unit in terms of major climates, suitable for a certain range of crops and cultivars. The Planning Commission of India, in 1989, in association with the National Remote Sensing Agency (NRSA), divided India into 15 Agro-Climatic Regions based on soil type, rainfall, temperature, and water availability. These are further divided into 72 sub-zones.
Figure 1: India's 15 Agro-Climatic Zones — 5 geographical groups. Delineated by Planning Commission + NRSA (1989). Expand each zone below for full details.
🎯 Objectives of ACZ Planning
- To optimise agricultural production on a region-specific basis
- To increase farm income and rural employment
- To ensure judicious use of available irrigation water
- To reduce regional inequalities in agricultural development
- Scientific management of natural resources without degrading environment
- To achieve food, fibre, fodder & fuel security
📋 Key Classifying Parameters
- Rainfall: Annual quantum, seasonal distribution, variability
- Temperature: Mean annual, seasonal range, frost days
- Soil type: Texture, depth, drainage, fertility
- Water resources: Surface and groundwater availability
- Length of growing period (LGP): Days with adequate moisture
- Cropping pattern: Existing crop suitability and land use
2. All 15 Agro-Climatic Zones — Detailed
Click each zone to expand details. Memorise zone numbers, states, key crops, and soil types for Prelims. For Mains, focus on challenges and agricultural significance.
🏔️ Group A: Himalayan Zones (Zone 1 & 2)
States: Jammu & Kashmir, Himachal Pradesh, Uttarakhand (hills), UP hills
Rainfall: 650–2000 mm (mostly SW monsoon + Western Disturbances)
Temperature: 1°C to 30°C (extreme cold in winters)
Soil: Mountain soils, forest soils, shallow & stony
Rainfall: 650–2000 mm (mostly SW monsoon + Western Disturbances)
Temperature: 1°C to 30°C (extreme cold in winters)
Soil: Mountain soils, forest soils, shallow & stony
Key Crops: Apple, Pear, Cherry, Apricot (horticulture); Wheat, Barley, Maize, Potato, Saffron
LGP: Short (90–150 days in higher altitudes)
Irrigation: Very limited; snowmelt-fed rivers used
LGP: Short (90–150 days in higher altitudes)
Irrigation: Very limited; snowmelt-fed rivers used
AppleSaffronBarleyPotato
Mountain Soil650–2000 mm
UPSC Angle: Kashmir Saffron received GI tag (2020). Saffron Mission under MIDH. Apple export from HP is a recurring economic geography point. Shifting cultivation (Kumri) in W. Ghats and NE — this zone uses different practices.
States: Assam, Sikkim, WB (Darjeeling), Arunachal, Manipur, Meghalaya, Mizoram, Nagaland, Tripura
Rainfall: 2000–4000 mm (extremely high; Cherrapunji in this zone)
Temperature: 5°C to 35°C
Soil: Forest soils, laterite, light loamy
Rainfall: 2000–4000 mm (extremely high; Cherrapunji in this zone)
Temperature: 5°C to 35°C
Soil: Forest soils, laterite, light loamy
Key Crops: Rice, Maize, Jute, Tea, Cardamom, Ginger, Turmeric, Rubber
Shifting Cultivation: Called Jhum cultivation — a key UPSC topic
Challenge: Soil erosion, poor market access, landslides
Shifting Cultivation: Called Jhum cultivation — a key UPSC topic
Challenge: Soil erosion, poor market access, landslides
TeaCardamomRiceJute
Laterite2000–4000 mm
UPSC Angle: Over 80% workforce depends on agriculture. Jhum cultivation leads to deforestation — UPSC Mains question topic. Darjeeling tea has GI tag. Sikkim is India's first 100% organic state. Biodiversity hotspot — Eastern Himalaya.
🌾 Group B: Gangetic Plains Zones (Zone 3, 4, 5, 6)
States: West Bengal (plains)
Rainfall: 1400–1800 mm
Temperature: 15°C to 40°C
Soil: Deep alluvial soils (fertile)
Rainfall: 1400–1800 mm
Temperature: 15°C to 40°C
Soil: Deep alluvial soils (fertile)
Key Crops: Rice (major crop), Jute, Potato, Oilseeds, Vegetables, Sugarcane
Cropping Intensity: Very high (200%+)
Challenge: Flooding, waterlogging, cyclone damage (coastal)
Cropping Intensity: Very high (200%+)
Challenge: Flooding, waterlogging, cyclone damage (coastal)
RiceJutePotato
Deep Alluvial1400–1800 mm
States: Eastern Uttar Pradesh, Bihar
Rainfall: 1000–1200 mm
Temperature: 10°C to 45°C (continental extremes)
Soil: Deep alluvial soils (Indo-Gangetic plain)
Rainfall: 1000–1200 mm
Temperature: 10°C to 45°C (continental extremes)
Soil: Deep alluvial soils (Indo-Gangetic plain)
Key Crops: Rice, Wheat, Sugarcane, Maize, Pulses, Vegetables
Irrigation: Canals (Sone Canal, Eastern Canal) + tubewells
Challenge: Flooding (Kosi, Ganga), groundwater depletion
Irrigation: Canals (Sone Canal, Eastern Canal) + tubewells
Challenge: Flooding (Kosi, Ganga), groundwater depletion
RiceWheatSugarcane
Alluvial1000–1200 mm
UPSC Angle: Kosi river floods Bihar annually — disaster management link. Bihar's sugarcane industry. Green Revolution's eastern extension — yield gap still significant vs Punjab.
States: Western Uttar Pradesh, Uttarakhand (Terai)
Rainfall: 800–1000 mm
Temperature: 10°C to 45°C
Soil: Deep alluvial — Khadar (newer) and Bhangar (older)
Rainfall: 800–1000 mm
Temperature: 10°C to 45°C
Soil: Deep alluvial — Khadar (newer) and Bhangar (older)
Key Crops: Wheat, Rice, Sugarcane, Cotton, Pulses, Vegetables
Irrigation: Highest canal density in India (Upper Ganga Canal, Sharda Canal)
Challenge: Groundwater overexploitation, soil salinisation
Irrigation: Highest canal density in India (Upper Ganga Canal, Sharda Canal)
Challenge: Groundwater overexploitation, soil salinisation
WheatSugarcaneRice
Khadar/Bhangar800–1000 mm
States: Punjab, Haryana, Delhi, Western Rajasthan
Rainfall: 300–800 mm (decreases westward; semi-arid to arid)
Temperature: 10°C to 45°C (continental climate)
Soil: Sandy loam, alluvial (fertile in Punjab)
Rainfall: 300–800 mm (decreases westward; semi-arid to arid)
Temperature: 10°C to 45°C (continental climate)
Soil: Sandy loam, alluvial (fertile in Punjab)
Key Crops: Wheat (dominant), Rice, Cotton, Maize, Sugarcane, Pulses, Oilseeds
Irrigation: Canal + tube well irrigation; highest irrigation intensity
Distinction: Birthplace of Green Revolution in India
Irrigation: Canal + tube well irrigation; highest irrigation intensity
Distinction: Birthplace of Green Revolution in India
WheatRiceCotton
Sandy Loam300–800 mm
UPSC Critical Issue: (1) Groundwater depletion — Punjab has over-exploited its water table. (2) Paddy stubble burning — causes Delhi's winter smog; NGT orders, SC intervention. (3) Wheat-Rice monoculture — breaking cycle is a policy priority. Parali burning is a hot UPSC topic.
🏜️ Group C: Plateau & Highland Zones (Zone 7, 8, 9, 10)
States: Jharkhand, Odisha, Chhattisgarh, Eastern Madhya Pradesh
Rainfall: 1000–1600 mm (mostly rainfed)
Temperature: 8°C to 42°C
Soil: Red soils, Laterite soils — generally low fertility
Rainfall: 1000–1600 mm (mostly rainfed)
Temperature: 8°C to 42°C
Soil: Red soils, Laterite soils — generally low fertility
Key Crops: Rice (kharif), Maize, Millets, Pulses, Oilseeds, Tobacco, Potato
Irrigation: Very low; largely rainfed agriculture
Challenge: Tribal poverty, low input use, poor infrastructure
Irrigation: Very low; largely rainfed agriculture
Challenge: Tribal poverty, low input use, poor infrastructure
RiceMilletsPulses
Red/Laterite1000–1600 mm
UPSC Angle: High tribal population — food security and poverty issues. Rich in minerals but agricultural backwardness. Watershed development programmes key to improvement. HYV adoption still low — scope for "Evergreen Revolution."
States: Central Madhya Pradesh, Rajasthan (eastern parts), Bundelkhand
Rainfall: 750–1000 mm (semi-arid)
Temperature: 5°C to 47°C (extreme range)
Soil: Black (Regur) soils, Red soils, mixed
Rainfall: 750–1000 mm (semi-arid)
Temperature: 5°C to 47°C (extreme range)
Soil: Black (Regur) soils, Red soils, mixed
Key Crops: Soybean, Wheat, Jowar, Gram, Oilseeds, Cotton
Irrigation: Limited; Chambal irrigation canal system
Challenge: Drought-prone, soil erosion, Bundelkhand drought crisis
Irrigation: Limited; Chambal irrigation canal system
Challenge: Drought-prone, soil erosion, Bundelkhand drought crisis
SoybeanWheatGram
Black (Regur)750–1000 mm
UPSC Angle: MP is the "Soybean Capital of India" (produces ~50% of national output). Bundelkhand has been a recurring drought crisis zone — Bundelkhand Package announced multiple times. Chambal valley — ravine lands and dacoits historically (GS1 topic).
States: Maharashtra (Vidarbha, Marathwada, N. Karnataka parts)
Rainfall: 700–1000 mm (semi-arid; recurrent deficit)
Temperature: 10°C to 42°C
Soil: Black cotton soil (Regur) — cotton-growing soils
Rainfall: 700–1000 mm (semi-arid; recurrent deficit)
Temperature: 10°C to 42°C
Soil: Black cotton soil (Regur) — cotton-growing soils
Key Crops: Cotton, Sorghum (Jowar), Tur (Pigeon pea), Gram, Soybean, Oilseeds
Irrigation: Low; dependence on rainfed farming
Challenge: Recurrent drought, farmer suicides crisis
Irrigation: Low; dependence on rainfed farming
Challenge: Recurrent drought, farmer suicides crisis
CottonJowarTur Dal
Black Cotton700–1000 mm
UPSC Critical Issue: Farmer Suicides in Vidarbha — Maharashtra accounts for ~30% of India's farmer suicides. Causes: Bt cotton crop failure, debt, drought, MSP issues. Policy responses: Debt waiver schemes, PM-KISAN, PMFBY. Niti Aayog reports on agrarian distress.
States: Interior Andhra Pradesh, Karnataka Plateau, Interior Tamil Nadu
Rainfall: 500–1000 mm (semi-arid; bimodal rainfall)
Temperature: 15°C to 40°C
Soil: Red loamy soils, Black soils, Mixed red-black
Rainfall: 500–1000 mm (semi-arid; bimodal rainfall)
Temperature: 15°C to 40°C
Soil: Red loamy soils, Black soils, Mixed red-black
Key Crops: Millets (Ragi, Jowar), Groundnut, Cotton, Pulses, Sugarcane, Sunflower
Irrigation: Traditional tank irrigation; tube wells
Distinction: India's Millet Bowl (Ragi production highest here)
Irrigation: Traditional tank irrigation; tube wells
Distinction: India's Millet Bowl (Ragi production highest here)
RagiGroundnutSunflower
Red Loamy500–1000 mm
UPSC Angle: Deccan Plateau — tank irrigation is traditional & ancient (Hoysala, Vijayanagara). Karnataka is largest producer of ragi; AP is major sunflower producer. APCNF (natural farming) pilot in AP. K'taka's Cauvery water dispute with TN.
🌊 Group D: Coastal Zones (Zone 11 & 12)
States: Coastal Tamil Nadu, Coastal Andhra Pradesh, Puducherry
Rainfall: 900–1200 mm (NE Monsoon dependent — Oct–Dec)
Temperature: 20°C to 42°C (tropical, humid)
Soil: Coastal alluvial, red & laterite soils
Rainfall: 900–1200 mm (NE Monsoon dependent — Oct–Dec)
Temperature: 20°C to 42°C (tropical, humid)
Soil: Coastal alluvial, red & laterite soils
Key Crops: Rice (dominant), Sugarcane, Groundnut, Cotton, Banana, Pulses
Irrigation: Canals (Krishna, Cauvery, Godavari deltas)
Challenge: Cyclones (Bay of Bengal), soil salinity ingress, NE monsoon failure
Irrigation: Canals (Krishna, Cauvery, Godavari deltas)
Challenge: Cyclones (Bay of Bengal), soil salinity ingress, NE monsoon failure
RiceSugarcaneBanana
Coastal AlluvialNE Monsoon
UPSC Angle: Unique feature: This zone receives rainfall from the NE Monsoon (retreating monsoon) — unlike the rest of India which depends on SW Monsoon. Krishna-Godavari delta is India's "Rice Bowl." Cyclone vulnerability — NDMA response framework.
States: Kerala, Goa, Coastal Karnataka, Western Maharashtra
Rainfall: 2000–4000+ mm (highest in peninsular India)
Temperature: 20°C to 35°C (tropical humid)
Soil: Laterite soils, alluvial (river valleys)
Rainfall: 2000–4000+ mm (highest in peninsular India)
Temperature: 20°C to 35°C (tropical humid)
Soil: Laterite soils, alluvial (river valleys)
Key Crops: Rice, Coconut, Cashew, Rubber, Tea, Coffee (Coorg), Pepper, Cardamom, Arecanut
Distinction: India's "Spice Garden"
Challenge: Land scarcity, high rainfall management, landslides
Distinction: India's "Spice Garden"
Challenge: Land scarcity, high rainfall management, landslides
CoconutRubberSpicesCoffee
Laterite2000–4000 mm
UPSC Angle: India's largest producer of coconut (Kerala), rubber (Kerala), pepper. Plantation agriculture (colonial legacy). Kerala floods (2018, 2024) — disaster management. Western Ghats biodiversity hotspot. Coorg (Kodagu) coffee — GI Tag.
🌵 Group E: Arid & Semi-Arid Zones (Zone 13 & 14)
States: Gujarat
Rainfall: 400–900 mm (decreases from E to W; Kutch <300 mm)
Temperature: 12°C to 42°C
Soil: Medium black soils, alluvial (north), sandy (Kutch)
Rainfall: 400–900 mm (decreases from E to W; Kutch <300 mm)
Temperature: 12°C to 42°C
Soil: Medium black soils, alluvial (north), sandy (Kutch)
Key Crops: Cotton, Groundnut, Wheat, Bajra (Pearl millet), Sugarcane, Castor, Tobacco
Irrigation: Narmada Canal (SARDAR SAROVAR), tube wells
Distinction: Highest cotton production; dairy cooperative model (Amul)
Irrigation: Narmada Canal (SARDAR SAROVAR), tube wells
Distinction: Highest cotton production; dairy cooperative model (Amul)
CottonGroundnutCastor
Black/Alluvial400–900 mm
UPSC Angle: Gujarat is largest producer of cotton and groundnut. Amul cooperative (Anand model) — blueprint for dairy sector. Kutch — ecologically sensitive; largest salt marsh. Sardar Sarovar dam — SSP controversy. Castor oil — Gujarat is world's top producer.
States: Western Rajasthan (Thar Desert region)
Rainfall: Less than 300 mm (very scarce; most arid in India)
Temperature: 5°C to 48°C (extreme range — highest in India)
Soil: Sandy desert soils, arid soils
Rainfall: Less than 300 mm (very scarce; most arid in India)
Temperature: 5°C to 48°C (extreme range — highest in India)
Soil: Sandy desert soils, arid soils
Key Crops: Bajra, Jowar, Cluster bean (Guar), Moth bean, Sesame
Irrigation: Indira Gandhi Canal (IGNP) — transformational
Challenge: Desertification, sand dunes, water scarcity
Irrigation: Indira Gandhi Canal (IGNP) — transformational
Challenge: Desertification, sand dunes, water scarcity
BajraGuarMoth Bean
Sandy Desert<300 mm
UPSC Angle: Desertification threat — Thar Desert is expanding (UNEP data). IGNP (Indira Gandhi Nahar Pariyojana) — world's longest canal; brought agriculture to arid Rajasthan. Rajasthan is largest mustard producer but mustard is a rabi crop grown in eastern/central Rajasthan. Guar is major export crop (guar gum for oil industry).
🏝️ Group F: Island Region (Zone 15)
Union Territories: Andaman & Nicobar Islands, Lakshadweep
Rainfall: 1500–3500 mm (high; maritime)
Temperature: 23°C to 32°C (equatorial/tropical)
Soil: Sandy loam, coastal alluvial, forest soils
Rainfall: 1500–3500 mm (high; maritime)
Temperature: 23°C to 32°C (equatorial/tropical)
Soil: Sandy loam, coastal alluvial, forest soils
Key Crops: Rice, Coconut, Arecanut, Banana, Spices, Paddy
Distinct feature: Maritime climate; marine fisheries dominant
Challenge: Sea-level rise, climate vulnerability, remoteness
Distinct feature: Maritime climate; marine fisheries dominant
Challenge: Sea-level rise, climate vulnerability, remoteness
CoconutRiceSpices
Sandy/Coastal1500–3500 mm
UPSC Angle: A&N Islands — ITCZ climate (equatorial). Lakshadweep — coral atolls; threatened by sea-level rise. Tribal communities — Jarawa, Sentinelese (protected). Marine biodiversity — GS1 and Environment angle.
📊 Quick Reference: All 15 Zones at a Glance
| Zone No. | Zone Name | Key States | Dominant Crops | Soil Type | Rainfall |
|---|---|---|---|---|---|
| 1 | Western Himalayan | J&K, HP, UK Hills | Apple, Saffron, Barley, Wheat | Mountain Forest | 650–2000 mm |
| 2 | Eastern Himalayan | Assam, Sikkim, NE States | Tea, Rice, Cardamom, Jute | Laterite, Forest | 2000–4000 mm |
| 3 | Lower Gangetic Plains | West Bengal | Rice, Jute, Potato | Deep Alluvial | 1400–1800 mm |
| 4 | Middle Gangetic Plains | E.UP, Bihar | Rice, Wheat, Sugarcane | Alluvial | 1000–1200 mm |
| 5 | Upper Gangetic Plains | W.UP, UK Terai | Wheat, Sugarcane, Rice | Khadar & Bhangar | 800–1000 mm |
| 6 | Trans-Gangetic Plains | Punjab, Haryana, Delhi | Wheat, Rice, Cotton | Sandy Loam, Alluvial | 300–800 mm |
| 7 | Eastern Plateau & Hills | Jharkhand, Odisha, CG | Rice, Millets, Pulses | Red, Laterite | 1000–1600 mm |
| 8 | Central Plateau & Hills | Central MP, Bundelkhand | Soybean, Wheat, Jowar | Black (Regur) | 750–1000 mm |
| 9 | Western Plateau & Hills | Maharashtra (Vidarbha) | Cotton, Jowar, Tur | Black Cotton | 700–1000 mm |
| 10 | Southern Plateau & Hills | AP, K'taka, TN (interior) | Ragi, Groundnut, Sunflower | Red Loamy, Black | 500–1000 mm |
| 11 | East Coast Plains | Coastal TN & AP | Rice, Sugarcane, Banana | Coastal Alluvial | 900–1200 mm (NEM) |
| 12 | West Coast Plains & Ghats | Kerala, Goa, Coastal K'taka | Coconut, Rubber, Spices | Laterite | 2000–4000+ mm |
| 13 | Gujarat Plains & Hills | Gujarat | Cotton, Groundnut, Castor | Black, Alluvial | 400–900 mm |
| 14 | Western Dry Region | W. Rajasthan | Bajra, Guar, Moth bean | Sandy Desert | <300 mm |
| 15 | Islands Region | A&N, Lakshadweep | Coconut, Rice, Spices | Sandy, Coastal | 1500–3500 mm |
💡 Mnemonic to Remember 15 Zones in Order
W-E-L-M-U-T-E-C-W-S-E-W-G-W-IWestern Himalayan · Eastern Himalayan · Lower Gangetic · Middle Gangetic · Upper Gangetic · Trans-Gangetic · Eastern Plateau · Central Plateau · Western Plateau · Southern Plateau · East Coast · West Coast · Gujarat · Western Dry · Islands
3. ACZ vs AEZ — A Critical Distinction
One of the most frequently asked UPSC conceptual questions is the difference between Agro-Climatic Zones (ACZ) and Agro-Ecological Zones (AEZ). This comparison is crucial for Mains answers.
🌦️ Agro-Climatic Zone (ACZ)
- Based on climate parameters only — rainfall, temperature, humidity, and length of growing period
- Delineated by Planning Commission + NRSA (1989)
- 15 major zones, 72 sub-zones
- Does NOT consider landform or natural vegetation
- Focus: Crop suitability for a region-based agricultural plan
- Broader classification — first level of differentiation
🌿 Agro-Ecological Zone (AEZ)
- Based on climate + landform + soil + natural vegetation
- Delineated by NBSS&LUP (ICAR)
- 20 agro-ecological regions in India
- AEZ is carved out of ACZ — a sub-set
- Landform acts as a modifier to climate and LGP
- More precise; used for soil conservation and biodiversity
Key Formula: Agro-Ecological Zone = Agro-Climatic Zone + Landform (which modifies climate and length of growing period). NBSS&LUP under ICAR has delineated 20 such regions.
| Parameter | Agro-Climatic Zone (ACZ) | Agro-Ecological Zone (AEZ) |
|---|---|---|
| Classification basis | Climate (rainfall, temp, LGP) | Climate + Landform + Soil + Vegetation |
| Number in India | 15 zones + 72 sub-zones | 20 agro-ecological regions |
| Delineated by | Planning Commission + NRSA (1989) | NBSS&LUP / ICAR |
| Scope | Broader; first-level differentiation | Narrower; sub-set of ACZ |
| Primary use | Agricultural planning & crop zoning | Soil conservation, biodiversity, ecology |
| Landform included? | No | Yes — key differentiator |
4. Agricultural Significance & Policy Linkages
Figure 2: Agro-Climatic Zones drive crop planning, water management, climate adaptation, policy allocation, ICAR research, and sustainable farming
🌾 Crop Planning
- Crop-specific zoning
- HYV seed allocation
- Region-specific MSP
- Crop diversification
💧 Water Resource
- Irrigation planning
- Watershed development
- Rainwater harvesting
- Groundwater zones
🌡️ Climate Adaptation
- Zone-specific resilience
- Drought-tolerant crops
- Climate-smart villages
- NMSA implementation
📋 Policy Making
- PM Dhan-Dhaanya
- RKVY fund allocation
- Agri-infra investment
- State agri plans
🔬 Research (ICAR)
- Zone-specific varieties
- 1888+ stress-tolerant crops
- Biofortified crops
- Pest-resistant HYVs
🌿 Sustainability
- Soil health management
- Organic zone mapping
- Natural farming rollout
- Agroforestry zoning
UPSC 2025 Angle — PM Dhan-Dhaanya Krishi Yojana: Announced in Union Budget 2025-26, this scheme targets 100 agriculture-lagging districts with a geographically differentiated approach — essentially applying agro-climatic zone logic at the district level. It signals India's shift from one-size-fits-all national schemes to zone-specific interventions.
5. Current Affairs 2024–26 (Agro-Climatic Zones & Related)
High-priority updates directly linked to agro-climatic zones for Prelims 2026 and Mains 2025 preparation:
Policy — 2025
Union Budget 2025–26 | February 2025
PM Dhan-Dhaanya Krishi Yojana — Zone-Specific Agricultural Empowerment
The scheme targets 100 agriculture-lagging districts across India — a direct application of agro-climatic planning. It recognises that different zones have different constraints (water scarcity in Zone 14, soil erosion in Zone 7, market access in Zone 2) and tailors interventions accordingly. It represents the most explicit zone-based policy targeting since 1989.
Climate — 2024–25
Scientific Reports 2024 | Nature Publishing Group
Rising Temperatures Across ACZs — Southern, Western & Central Zones Most Affected
A 2024 study analysing temperature trends across India's agro-climatic zones (1951–2022) found that southern, western, and central parts of India are consistently experiencing rising maximum and minimum temperatures. The study used Innovative Polygonal Trend Analysis (IPTA) — relevant for GS III (Climate Change & Agriculture). Zone 14 (Rajasthan) recorded temperatures up to 48°C in 2025.
Crisis — 2024
Centre for Science & Environment | 2024
Extreme Weather Affected 3.2 Million Hectares of Cropland in 2024
Extreme weather events occurred on ~90% of days from January to September 2024 in India. About 3.2 million hectares of cropland were damaged and ~10,000 livestock lost. Zones 9 (W. Plateau), 14 (Western Dry), and 6 (Trans-Gangetic) were most impacted. This directly disrupts agro-climatic zone-based agricultural calendars.
Scheme — 2025
2025 | Central Sector Scheme
National Mission on Natural Farming (NMNF) — Zone-Wise Rollout
NMNF with ₹2,481 crore outlay targets 1 crore farmers across 7.5 lakh hectares. Rollout is zone-sensitive: Zone 12 (West Coast) already has high organic farming adoption, while Zones 7 and 8 (tribal plateau areas) are priority targets given low chemical input use. Promotes Bhartiya Prakritik Krishi Paddhati (BPKP).
Technology — 2025
2024–25 | Digital Agriculture Mission
AgriStack & Kisan ID — Zone-Based Digital Farmer Registry
India's Digital Agriculture Mission creates a Farmer Digital ID (Kisan ID) and Crop Registry linked to agro-climatic zones. This enables zone-specific advisory (different crop calendars for Zone 11 NE monsoon vs Zone 6 SW monsoon), targeted input delivery, and satellite-based crop loss assessment under PMFBY.
Research — 2024–25
Tamil Nadu Agricultural University | 2025
Climate Impact on Major Crops Across Tamil Nadu's 7 ACZs (SSP 2-4.5 Scenario)
A 2025 study across Tamil Nadu's 7 agro-climatic zones found that under SSP 2-4.5 scenario, annual mean maximum temperature could rise by 0.4°C and minimum by 0.6°C by 2050. Annual rainfall expected to increase by ~4%. Crop simulation models (DSSAT) show varying impacts on rice, maize, sorghum, and groundnut — zone-specific adaptation strategies are now essential.
Parali Crisis — 2024–25
2024 Kharif Season | Zone 6
Stubble Burning (Zone 6: Trans-Gangetic Plains) — Ongoing Crisis
Despite SC orders, NGT bans, and satellite monitoring, paddy stubble burning in Punjab and Haryana (Zone 6) continued in 2024. This is an agro-climatic problem rooted in the wheat-rice monoculture promoted by Green Revolution — unsuitable for the zone's natural ecology. Government is promoting Happy Seeder technology and crop diversification (maize, vegetables) in this zone.
Millet Promotion — 2024–25
Post-IYM 2023 | Ongoing
Shree Anna (Millets) Expansion Aligned with Agro-Climatic Zones
Post International Year of Millets (2023), India is expanding millet cultivation in suitable agro-climatic zones: Bajra in Zone 14 (arid Rajasthan), Ragi in Zone 10 (Southern Plateau), Jowar in Zones 9 & 10 (Deccan). Millets are drought-tolerant and nutritionally superior — perfectly aligned with India's semi-arid and arid zones where chemical-intensive agriculture is unsustainable.
6. Prelims PYQs — Agro-Climatic Zones & Related
Actual UPSC Prelims questions with correct answers highlighted and detailed explanations:
Q1. With reference to India's agricultural zones, consider the following statements about turmeric:
Statement I: India cultivates over 30 varieties of turmeric adapted to different agro-climatic zones.
Statement II: Maharashtra, Telangana, Karnataka and Tamil Nadu are among major turmeric producers.
How many of the above statements are correct?
Statement I: India cultivates over 30 varieties of turmeric adapted to different agro-climatic zones.
Statement II: Maharashtra, Telangana, Karnataka and Tamil Nadu are among major turmeric producers.
How many of the above statements are correct?
- (a) Only Statement I
- (b) Only Statement II
- ✓ (c) Both statements are correct
- (d) Neither statement is correct
Both statements are correct. India is the world's largest producer, consumer, and exporter of turmeric. More than 30 varieties exist adapted to different agro-climatic conditions. Telangana (Nizamabad) is India's "Turmeric City" and the world's largest turmeric trading centre. Maharashtra (Sangli), Tamil Nadu, and Karnataka are also major producers. Key Takeaway: Zone-specific crop varieties are the essence of agro-climatic planning.
Q2. In the context of India's preparation for Climate-Smart Agriculture, consider the following statements:
1. The 'Climate-Smart Village' approach in India is led by CCAFS.
2. CCAFS is an international research programme led by CGIAR.
3. The International Centre of Tropical Agriculture (CIAT) is located in Africa.
Which of the statements given above is/are correct?
1. The 'Climate-Smart Village' approach in India is led by CCAFS.
2. CCAFS is an international research programme led by CGIAR.
3. The International Centre of Tropical Agriculture (CIAT) is located in Africa.
Which of the statements given above is/are correct?
- (a) Only 1
- ✓ (b) 1 and 2 only
- (c) 2 and 3 only
- (d) All three
Statements 1 and 2 are correct. Statement 3 is wrong — CIAT is located in Palmira, Colombia (South America), not Africa. Climate-Smart Villages operate across various agro-climatic zones in India to build farmer resilience. CCAFS (Climate Change, Agriculture and Food Security) is indeed led by CGIAR. UPSC Angle: Climate-smart agriculture is zone-specific — dryland zones (14, 9) need different approaches than humid zones (2, 12).
Q3. Consider the following pairs — Agro-climatic region: Crop predominantly grown:
1. Western Himalayan — Saffron and Barley
2. Trans-Gangetic Plains — Wheat and Paddy
3. Eastern Plateau and Hills — Jowar and Pearl millet
Which of the pairs given above is/are correctly matched?
1. Western Himalayan — Saffron and Barley
2. Trans-Gangetic Plains — Wheat and Paddy
3. Eastern Plateau and Hills — Jowar and Pearl millet
Which of the pairs given above is/are correctly matched?
- ✓ (a) 1 and 2 only
- (b) 2 and 3 only
- (c) 1 and 3 only
- (d) All three
Pairs 1 and 2 are correct. Pair 3 is wrong — the Eastern Plateau and Hills region (Zone 7) predominantly grows Rice, Millets (Ragi), Pulses, and Oilseeds. Jowar and Pearl millet are characteristic of Western and Southern Plateau zones (9, 10) and the arid zone (14). Saffron in Western Himalayas (Zone 1) and Wheat-Paddy in Trans-Gangetic Plains (Zone 6) are well-established facts. Tip: Memorise zone-crop pairings from the quick reference table above.
Q4. Which of the following is India's most important commercial crop?
- (a) Jute
- ✓ (b) Cotton
- (c) Sugarcane
- (d) Tea
Cotton is India's most important commercial/cash crop, often called "White Gold." It is primarily grown in agro-climatic zones 9 (W. Plateau — Maharashtra), 13 (Gujarat), and 10 (S. Plateau). India is the world's largest producer of cotton and a major exporter. Black cotton soil (Regur) in the Deccan is particularly suited to it. Note: Bt Cotton covers ~96% of India's cotton area.
Q5. Which of the following are the reasons for the eastern part of India having higher frequency of crop diversification?
1. Humid climate with high rainfall
2. Availability of well-drained upland areas
3. Fertile alluvial soils
Select the correct answer:
1. Humid climate with high rainfall
2. Availability of well-drained upland areas
3. Fertile alluvial soils
Select the correct answer:
- (a) 1 only
- (b) 2 and 3 only
- ✓ (c) 1 and 3 only
- (d) 1, 2 and 3
Statements 1 and 3 are correct. Eastern India (Zones 2, 3, 4) has humid climate with high rainfall enabling multiple cropping seasons. Fertile alluvial soils (Indo-Gangetic plain) allow diverse crop cultivation. Statement 2 is partially incorrect — while some upland areas exist in eastern India (Jharkhand), the defining agricultural feature of the region is floodplain agriculture on low-lying alluvial soils, not upland cultivation. Zone Link: Eastern Himalayan (Zone 2) and Lower/Middle Gangetic Plains (Zones 3, 4) explain this diversity.
7. Mains PYQs — Agro-Climatic Zones
Actual UPSC Mains questions with answer frameworks. These questions reflect the depth of analysis expected:
Q1. "The distribution of crops in India is closely tied to agro-climatic regions." Critically examine how variations in climate and soil affect the cropping patterns across different regions of the country. (250 words)
Introduction: India's diverse agro-climatic zones — 15 in total — directly determine its crop geography. Climate and soil collectively act as the 'silent decision-makers' of Indian agriculture.
How Climate Affects Cropping Patterns:
• Rainfall: Rice dominates humid zones (Zones 2, 3, 11) with 1000+ mm; millets dominate arid zones (Zone 14) with <300 mm
• Temperature: Saffron and temperate fruits in Western Himalayas (Zone 1); tropical plantation crops (coconut, rubber) in Zone 12
• LGP: Longer growing period in humid zones allows double/triple cropping (Zone 3 — cropping intensity 200%+)
• Monsoon pattern: Zone 11 (Tamil Nadu coast) depends on NE monsoon; all others depend on SW monsoon
How Soil Affects Cropping Patterns:
• Black (Regur) soil: Cotton cultivation in Zones 9, 13 (Maharashtra, Gujarat)
• Alluvial soil: Wheat-Rice in Zones 5, 6 (Indo-Gangetic plains)
• Laterite soil: Cashew, coconut, plantation crops in Zone 12
• Desert soil: Drought-resistant millets in Zone 14
Critical Examination — Distortions:
• MSP-driven monoculture in Zone 6 (Punjab-Haryana) — paddy grown in water-scarce areas
• Sugarcane in drought-prone Maharashtra — misalignment with zone characteristics
• Green Revolution skewed crop geography towards wheat-rice in zones better suited for other crops
Way Forward: ICAR's zone-specific crop recommendations must be adopted. PM Dhan-Dhaanya Krishi Yojana (2025) takes this approach. Aligning cropping patterns with agro-climatic suitability ensures sustainability and climate resilience.
How Climate Affects Cropping Patterns:
• Rainfall: Rice dominates humid zones (Zones 2, 3, 11) with 1000+ mm; millets dominate arid zones (Zone 14) with <300 mm
• Temperature: Saffron and temperate fruits in Western Himalayas (Zone 1); tropical plantation crops (coconut, rubber) in Zone 12
• LGP: Longer growing period in humid zones allows double/triple cropping (Zone 3 — cropping intensity 200%+)
• Monsoon pattern: Zone 11 (Tamil Nadu coast) depends on NE monsoon; all others depend on SW monsoon
How Soil Affects Cropping Patterns:
• Black (Regur) soil: Cotton cultivation in Zones 9, 13 (Maharashtra, Gujarat)
• Alluvial soil: Wheat-Rice in Zones 5, 6 (Indo-Gangetic plains)
• Laterite soil: Cashew, coconut, plantation crops in Zone 12
• Desert soil: Drought-resistant millets in Zone 14
Critical Examination — Distortions:
• MSP-driven monoculture in Zone 6 (Punjab-Haryana) — paddy grown in water-scarce areas
• Sugarcane in drought-prone Maharashtra — misalignment with zone characteristics
• Green Revolution skewed crop geography towards wheat-rice in zones better suited for other crops
Way Forward: ICAR's zone-specific crop recommendations must be adopted. PM Dhan-Dhaanya Krishi Yojana (2025) takes this approach. Aligning cropping patterns with agro-climatic suitability ensures sustainability and climate resilience.
Q2. Differentiate between Agro-Climatic Zones and Agro-Ecological Regions of India with suitable examples. What are the implications of understanding this correlation for agricultural planning? (250 words)
Introduction: India's agricultural diversity has led to dual classification systems — Agro-Climatic Zones (ACZ) and Agro-Ecological Regions (AEZ) — each serving distinct planning purposes.
Agro-Climatic Zone: Defined by major climate parameters — rainfall, temperature, and length of growing period. India has 15 ACZs delineated by Planning Commission + NRSA (1989). Example: Trans-Gangetic Plains (Zone 6) is defined by its 300–800 mm rainfall and continental climate supporting wheat-rice cultivation.
Agro-Ecological Zone: ACZ + Landform (which modifies climate). India has 20 AEZs delineated by NBSS&LUP (ICAR). Landform is the key addition. Example: Within Zone 12 (West Coast), the AEZ distinguishes between the narrow coastal strip, the Ghats slopes (different LGP), and the upland plateaus.
Key Distinction: AEZ = ACZ + Landform superimposition. AEZ is more granular and ecologically comprehensive.
Implications for Agricultural Planning:
• ACZ informs broad crop suitability, MSP allocation, irrigation priorities
• AEZ guides soil conservation, biodiversity mapping, agro-forestry placement
• PM Dhan-Dhaanya Krishi Yojana (2025) uses district-level zone sensitivity
• Climate-smart village programmes use AEZ for adaptation strategies
• ICAR uses AEZ to develop location-specific crop varieties (1,888+ released)
Conclusion: Understanding ACZ-AEZ correlation transforms agriculture from a generic national programme into a place-specific, resource-efficient, and climate-resilient system.
Agro-Climatic Zone: Defined by major climate parameters — rainfall, temperature, and length of growing period. India has 15 ACZs delineated by Planning Commission + NRSA (1989). Example: Trans-Gangetic Plains (Zone 6) is defined by its 300–800 mm rainfall and continental climate supporting wheat-rice cultivation.
Agro-Ecological Zone: ACZ + Landform (which modifies climate). India has 20 AEZs delineated by NBSS&LUP (ICAR). Landform is the key addition. Example: Within Zone 12 (West Coast), the AEZ distinguishes between the narrow coastal strip, the Ghats slopes (different LGP), and the upland plateaus.
Key Distinction: AEZ = ACZ + Landform superimposition. AEZ is more granular and ecologically comprehensive.
Implications for Agricultural Planning:
• ACZ informs broad crop suitability, MSP allocation, irrigation priorities
• AEZ guides soil conservation, biodiversity mapping, agro-forestry placement
• PM Dhan-Dhaanya Krishi Yojana (2025) uses district-level zone sensitivity
• Climate-smart village programmes use AEZ for adaptation strategies
• ICAR uses AEZ to develop location-specific crop varieties (1,888+ released)
Conclusion: Understanding ACZ-AEZ correlation transforms agriculture from a generic national programme into a place-specific, resource-efficient, and climate-resilient system.
Q3. What are the reasons for the spread of dryland agriculture in India? How is it important for food security? (150 words)
Introduction: About 60% of India's net cultivated area is rainfed (dryland). Concentrated in Zones 7–10 (Deccan Plateau), Zone 14 (Rajasthan), and parts of Zone 13 (Gujarat).
Reasons for Spread:
• Inadequate irrigation infrastructure — only ~52% of net sown area irrigated
• Geographical factors — peninsular plateau soils lack perennial water sources
• Economic constraints — small farmers cannot afford tube-well installation
• Natural agroecology — arid/semi-arid zones (14, 9, 10) inherently limit irrigation
• Historical neglect — Green Revolution focused on irrigated Indo-Gangetic plains
Importance for Food Security:
• Dryland crops (millets, pulses, oilseeds) provide nutrition security to 40% of India's food
• Drought-tolerant crops (bajra, ragi) are resilient to climate change
• National Food Security Act (NFSA) relies on dryland production for nutritional diversity
• Millets (Shree Anna) promoted post-IYM 2023 precisely for their dryland suitability
Way Forward: Watershed development, micro-irrigation, and NMSA-based climate adaptation in dryland ACZs.
Reasons for Spread:
• Inadequate irrigation infrastructure — only ~52% of net sown area irrigated
• Geographical factors — peninsular plateau soils lack perennial water sources
• Economic constraints — small farmers cannot afford tube-well installation
• Natural agroecology — arid/semi-arid zones (14, 9, 10) inherently limit irrigation
• Historical neglect — Green Revolution focused on irrigated Indo-Gangetic plains
Importance for Food Security:
• Dryland crops (millets, pulses, oilseeds) provide nutrition security to 40% of India's food
• Drought-tolerant crops (bajra, ragi) are resilient to climate change
• National Food Security Act (NFSA) relies on dryland production for nutritional diversity
• Millets (Shree Anna) promoted post-IYM 2023 precisely for their dryland suitability
Way Forward: Watershed development, micro-irrigation, and NMSA-based climate adaptation in dryland ACZs.
8. Mock Mains Questions — Agro-Climatic Zones
Practice these questions under timed conditions. Use the answer frameworks only after attempting independently:
Mains Mock
GS I
Geography – Agriculture
15 Marks
⏱ Suggested time: 15 minutes | 250 words
Q1. Agro-climatic zones of India reflect the country's immense geographical diversity. Identify the major agro-climatic zones and explain how they have shaped the pattern of agricultural development across regions.
Zone 6 — Green Revolution
Zone 14 — IGNP
Zone 12 — Plantation
Zone 2 — NE Biodiversity
Zone 9 — Farmer Distress
Structure: 5 representative zones (one from each geographical group) → agro-climatic features → how they shaped agricultural development → policy outcomes.
Introduction: India's 15 agro-climatic zones — delineated by the Planning Commission in 1989 — are a cartographic expression of the nation's ecological pluralism. Each zone has shaped a distinct agrarian civilization.
Major Zones and Agricultural Development:
• Zone 6 (Trans-Gangetic Plains): Alluvial soil + canals + HYV wheat → Green Revolution epicentre (1960s); highest productivity zone; now facing groundwater crisis and monoculture lock-in
• Zone 12 (West Coast & Ghats): Laterite soil + 3000+ mm rain → plantation agriculture (tea, coffee, rubber, spices); colonial legacy persists in estate ownership pattern
• Zone 14 (Western Dry): Desert soils + <300 mm rain → traditional millet-pastoral economy; transformed by IGNP (Indira Gandhi Nahar) enabling wheat/cotton cultivation in Thar
• Zone 2 (Eastern Himalayan): Laterite + high rainfall → Jhum cultivation (shifting cultivation), tea gardens (Darjeeling/Assam); biodiversity-rich but economically marginal
• Zone 9 (Western Plateau): Black cotton soil + 700–1000 mm → cotton belt; but rain-dependence and debt have created chronic farmer distress (Vidarbha)
Policy Impact:
• Green Revolution prioritised Zones 5 & 6 → regional inequality (Eastern India lagged)
• MSP regime skewed zone-appropriate cropping → sugarcane in drought zones (Zone 9)
• PM Dhan-Dhaanya (2025) attempts zone-sensitive correction
Conclusion: Understanding agro-climatic zones is foundational to resolving India's agrarian crisis — from the groundwater problem in Punjab to farmer suicides in Vidarbha. Zone-aligned policy is the path to sustainable agriculture.
Major Zones and Agricultural Development:
• Zone 6 (Trans-Gangetic Plains): Alluvial soil + canals + HYV wheat → Green Revolution epicentre (1960s); highest productivity zone; now facing groundwater crisis and monoculture lock-in
• Zone 12 (West Coast & Ghats): Laterite soil + 3000+ mm rain → plantation agriculture (tea, coffee, rubber, spices); colonial legacy persists in estate ownership pattern
• Zone 14 (Western Dry): Desert soils + <300 mm rain → traditional millet-pastoral economy; transformed by IGNP (Indira Gandhi Nahar) enabling wheat/cotton cultivation in Thar
• Zone 2 (Eastern Himalayan): Laterite + high rainfall → Jhum cultivation (shifting cultivation), tea gardens (Darjeeling/Assam); biodiversity-rich but economically marginal
• Zone 9 (Western Plateau): Black cotton soil + 700–1000 mm → cotton belt; but rain-dependence and debt have created chronic farmer distress (Vidarbha)
Policy Impact:
• Green Revolution prioritised Zones 5 & 6 → regional inequality (Eastern India lagged)
• MSP regime skewed zone-appropriate cropping → sugarcane in drought zones (Zone 9)
• PM Dhan-Dhaanya (2025) attempts zone-sensitive correction
Conclusion: Understanding agro-climatic zones is foundational to resolving India's agrarian crisis — from the groundwater problem in Punjab to farmer suicides in Vidarbha. Zone-aligned policy is the path to sustainable agriculture.
Mains Mock
GS III
Climate & Agriculture
15 Marks
⏱ Suggested time: 15 minutes | 250 words
Q2. "Climate change is disrupting India's agro-climatic zones and threatening food security." Discuss the zone-specific impacts and examine India's policy response to build climate-resilient agriculture.
Zone 6 — Temperature rise + parali
Zone 14 — Desertification
NMSA
ICAR — 1888 stress-tolerant varieties
Shree Anna
Ground in 2024–25 data: 3.2 mn ha cropland damaged, 48°C in Rajasthan, rising temperatures in southern/central ACZs (Nature 2024 study). Policy: NMSA, Climate-Smart Villages, PMFBY, NMNF, Shree Anna.
Introduction: India's 15 agro-climatic zones are experiencing measurable climate disruption. A 2024 study (Scientific Reports) confirms rising temperatures across southern, western and central zones since 1951. In 2024, extreme weather events affected over 3.2 million hectares of cropland.
Zone-Specific Climate Impacts:
• Zone 6 (Trans-Gangetic): Groundwater depletion + rising temperatures reduce wheat yields; paddy sowing is advancing earlier due to heat stress; parali burning worsens air quality
• Zone 14 (Western Dry): 48°C recorded in Ganganagar (2025); desertification expanding; bajra and guar yields falling; IGNP water availability declining
• Zones 2 & 3 (Eastern): Erratic monsoon — both floods and droughts; Assam floods damage rice crop annually
• Zone 9 (Western Plateau): Recurrent drought — Marathwada faced 3 consecutive dry spells (2022–24); cotton crop failure; farmer suicides
• Coastal Zones 11 & 12: Sea-level rise causing soil salinity ingress; cyclone intensity increasing
Policy Responses:
• NMSA: Zone-specific soil health, water conservation, crop diversification
• Climate-Smart Villages (CCAFS): Community-based zone-level adaptation
• ICAR: 1,888+ stress-tolerant varieties released; heat-tolerant wheat for Zone 6
• Shree Anna / NMNF: Millet promotion in arid and semi-arid zones
• PMFBY: Satellite-based crop loss assessment for zone-specific insurance
• PM Dhan-Dhaanya (2025): 100 agri-lagging districts targeted with zone-sensitive interventions
Conclusion: Climate-resilient agriculture requires abandoning uniform national approaches in favour of zone-aligned, locally adapted strategies. India's 2070 net-zero goal and food security imperatives make this non-negotiable.
Zone-Specific Climate Impacts:
• Zone 6 (Trans-Gangetic): Groundwater depletion + rising temperatures reduce wheat yields; paddy sowing is advancing earlier due to heat stress; parali burning worsens air quality
• Zone 14 (Western Dry): 48°C recorded in Ganganagar (2025); desertification expanding; bajra and guar yields falling; IGNP water availability declining
• Zones 2 & 3 (Eastern): Erratic monsoon — both floods and droughts; Assam floods damage rice crop annually
• Zone 9 (Western Plateau): Recurrent drought — Marathwada faced 3 consecutive dry spells (2022–24); cotton crop failure; farmer suicides
• Coastal Zones 11 & 12: Sea-level rise causing soil salinity ingress; cyclone intensity increasing
Policy Responses:
• NMSA: Zone-specific soil health, water conservation, crop diversification
• Climate-Smart Villages (CCAFS): Community-based zone-level adaptation
• ICAR: 1,888+ stress-tolerant varieties released; heat-tolerant wheat for Zone 6
• Shree Anna / NMNF: Millet promotion in arid and semi-arid zones
• PMFBY: Satellite-based crop loss assessment for zone-specific insurance
• PM Dhan-Dhaanya (2025): 100 agri-lagging districts targeted with zone-sensitive interventions
Conclusion: Climate-resilient agriculture requires abandoning uniform national approaches in favour of zone-aligned, locally adapted strategies. India's 2070 net-zero goal and food security imperatives make this non-negotiable.
Mains Mock
GS III
Food Security
10 Marks
⏱ Suggested time: 10 minutes | 150 words
Q3. How does agro-climatic zone-based planning contribute to food security and sustainable agriculture in India? Illustrate with specific zone examples.
Zone-crop alignment
Water use efficiency
Dryland zones
ICAR zone varieties
Focus on food security through zone-appropriate crops, efficient water use (no sugarcane in Zone 14), and ICAR zone-specific technologies. Link to PM Dhan-Dhaanya.
Introduction: India's 15 agro-climatic zones are the spatial foundation for sustainable food security — aligning crops with environment rather than forcing unsuitable cultivation.
Contribution to Food Security:
• Optimal crop selection: ICAR's zone-specific HYV seeds — e.g., submergence-tolerant rice 'Swarna Sub-1' for flood-prone Zone 4 (Bihar), drought-tolerant bajra for Zone 14
• Water efficiency: Zone-aligned cropping prevents water-intensive crops in semi-arid areas — sugarcane in Zone 9 is a counter-example of policy misalignment causing distress
• Multiple cropping: High-rainfall zones (3, 12) enable 2–3 crops per year — boosting food availability
• Nutritional security: Dryland zones (7, 8, 10) produce pulses, millets, oilseeds — proteins and micronutrients for rural food security
• Dryland revolution: 60% rainfed agriculture (Zones 7–10, 14) contributes to 40% of foodgrain production — cannot be neglected
Policy Link: PM Dhan-Dhaanya Krishi Yojana (2025) targets 100 lagging districts with zone-sensitive convergence — signalling a return to zone-based planning philosophy.
Conclusion: Zone-aligned agriculture is not just efficient — it is the only path to long-term food sovereignty in a climate-stressed India.
Contribution to Food Security:
• Optimal crop selection: ICAR's zone-specific HYV seeds — e.g., submergence-tolerant rice 'Swarna Sub-1' for flood-prone Zone 4 (Bihar), drought-tolerant bajra for Zone 14
• Water efficiency: Zone-aligned cropping prevents water-intensive crops in semi-arid areas — sugarcane in Zone 9 is a counter-example of policy misalignment causing distress
• Multiple cropping: High-rainfall zones (3, 12) enable 2–3 crops per year — boosting food availability
• Nutritional security: Dryland zones (7, 8, 10) produce pulses, millets, oilseeds — proteins and micronutrients for rural food security
• Dryland revolution: 60% rainfed agriculture (Zones 7–10, 14) contributes to 40% of foodgrain production — cannot be neglected
Policy Link: PM Dhan-Dhaanya Krishi Yojana (2025) targets 100 lagging districts with zone-sensitive convergence — signalling a return to zone-based planning philosophy.
Conclusion: Zone-aligned agriculture is not just efficient — it is the only path to long-term food sovereignty in a climate-stressed India.
Mains Mock
GS I
Geography + Economy
10 Marks
⏱ Suggested time: 10 minutes | 150 words
Q4. "The Green Revolution, while boosting food production, disrupted India's agro-climatic balance." Critically examine this statement with reference to the Trans-Gangetic Plains zone.
Zone 6
Wheat-rice monoculture
Groundwater depletion
Stubble burning
Crop diversification need
Zone 6 (Punjab-Haryana) is the Green Revolution's home. Acknowledge achievements, then critically examine: monoculture, water table, parali burning, and the need for zone-realigned agriculture.
Introduction: Zone 6 (Trans-Gangetic Plains — Punjab, Haryana) was the epicentre of India's Green Revolution from the 1960s, transforming India from a food-deficit to food-surplus nation. Yet it has come at an ecological cost that the zone's natural agro-climatic endowment cannot sustain.
Green Revolution Achievements in Zone 6:
• Wheat production tripled between 1965 and 1985
• India achieved food self-sufficiency by 1970s
• Per capita food availability increased substantially
• Created model for agricultural intensification globally
Disruption of Agro-Climatic Balance:
• Groundwater crisis: Punjab extracts 3x more water than recharge rate; water table falling by 0.5–1 m per year — naturally, Zone 6's 300–800 mm rainfall cannot support rice cultivation
• Monoculture lock-in: Wheat-rice cycle replacing the zone's natural crop diversity (cotton, maize, pulses)
• Soil degradation: Excessive fertiliser use — N:P:K ratio severely imbalanced
• Stubble burning (Parali): 20 million tonnes of paddy straw burned annually — destroying soil microbiome and creating air pollution crisis
Way Forward: Crop diversification incentives (MSP for maize, vegetables), groundwater regulation laws, Happy Seeder technology, Zone 6-specific natural farming pilots under NMNF.
Conclusion: Sustainable food security requires re-aligning Zone 6 with its natural agro-climatic endowment — not abandoning the Green Revolution, but evolving it into an Evergreen Revolution.
Green Revolution Achievements in Zone 6:
• Wheat production tripled between 1965 and 1985
• India achieved food self-sufficiency by 1970s
• Per capita food availability increased substantially
• Created model for agricultural intensification globally
Disruption of Agro-Climatic Balance:
• Groundwater crisis: Punjab extracts 3x more water than recharge rate; water table falling by 0.5–1 m per year — naturally, Zone 6's 300–800 mm rainfall cannot support rice cultivation
• Monoculture lock-in: Wheat-rice cycle replacing the zone's natural crop diversity (cotton, maize, pulses)
• Soil degradation: Excessive fertiliser use — N:P:K ratio severely imbalanced
• Stubble burning (Parali): 20 million tonnes of paddy straw burned annually — destroying soil microbiome and creating air pollution crisis
Way Forward: Crop diversification incentives (MSP for maize, vegetables), groundwater regulation laws, Happy Seeder technology, Zone 6-specific natural farming pilots under NMNF.
Conclusion: Sustainable food security requires re-aligning Zone 6 with its natural agro-climatic endowment — not abandoning the Green Revolution, but evolving it into an Evergreen Revolution.
Mains Mock
GS III
Sustainable Agriculture
10 Marks
⏱ Suggested time: 10 minutes | 150 words
Q5. The promotion of millets (Shree Anna) is being called India's "zone-appropriate" food strategy. Explain why millets are suitable for India's semi-arid and arid agro-climatic zones and their role in nutritional security.
IYM 2023
Zone 14 — Bajra
Zone 10 — Ragi
Zone 9 — Jowar
Nutritional profile
Link millets to specific zones (bajra = Zone 14, ragi = Zone 10, jowar = Zones 9–10). Climate resilience: drought-tolerant, low water requirement. Nutrition: iron, calcium, fibre. IYM 2023 and post-IYM policy.
Introduction: India's semi-arid and arid agro-climatic zones (Zones 9, 10, 14) cover nearly 40% of the country's agricultural area. Millets — called Shree Anna by the government — are uniquely suited to these zones, offering both ecological alignment and nutritional value.
Zone-Millet Alignment:
• Zone 14 (Western Dry — Rajasthan): Pearl millet (Bajra) — thrives on <400 mm rainfall; deep-rooted; heat-tolerant; traditional staple
• Zone 10 (Southern Plateau — Karnataka, AP): Finger millet (Ragi) — grows on red laterite soils; drought-resistant; requires only 400–600 mm rainfall
• Zones 9, 10 (Deccan): Sorghum (Jowar) — grows on black cotton soil without irrigation; 3–5x more water-efficient than rice
• Zones 7, 8 (Eastern, Central Plateau): Small millets — Kodo, Kutki — grown by tribal communities under rainfed conditions
Nutritional Profile:
• Ragi — highest calcium among cereals (344 mg/100g); critical for children and women
• Bajra — rich in iron (11 mg/100g); addresses anaemia
• All millets — high fibre, low glycaemic index; suitable for diabetics
• Nutrient-dense compared to polished rice and maida
Policy Push (IYM 2023 Legacy): India led the UN resolution for IYM 2023. NMNF promotes natural millet cultivation. Millets included in PDS in several states. Export promotion under APEDA.
Conclusion: Millets are not just traditional crops — they are the climate-resilient, nutritionally superior, zone-appropriate future of India's dryland agriculture.
Zone-Millet Alignment:
• Zone 14 (Western Dry — Rajasthan): Pearl millet (Bajra) — thrives on <400 mm rainfall; deep-rooted; heat-tolerant; traditional staple
• Zone 10 (Southern Plateau — Karnataka, AP): Finger millet (Ragi) — grows on red laterite soils; drought-resistant; requires only 400–600 mm rainfall
• Zones 9, 10 (Deccan): Sorghum (Jowar) — grows on black cotton soil without irrigation; 3–5x more water-efficient than rice
• Zones 7, 8 (Eastern, Central Plateau): Small millets — Kodo, Kutki — grown by tribal communities under rainfed conditions
Nutritional Profile:
• Ragi — highest calcium among cereals (344 mg/100g); critical for children and women
• Bajra — rich in iron (11 mg/100g); addresses anaemia
• All millets — high fibre, low glycaemic index; suitable for diabetics
• Nutrient-dense compared to polished rice and maida
Policy Push (IYM 2023 Legacy): India led the UN resolution for IYM 2023. NMNF promotes natural millet cultivation. Millets included in PDS in several states. Export promotion under APEDA.
Conclusion: Millets are not just traditional crops — they are the climate-resilient, nutritionally superior, zone-appropriate future of India's dryland agriculture.
Mains Mock
GS I
Physical Geography
15 Marks
⏱ Suggested time: 15 minutes | 250 words
Q6. Discuss the role of soil types in determining agro-climatic zones in India. How does the black cotton soil (Regur) region differ from the red laterite regions in terms of agricultural potential?
Regur — Zones 9, 13
Laterite — Zones 12, 7
Cotton vs Coconut/Spices
Moisture retention
Soil Health Card scheme
Compare the two soil types: Regur (self-ploughing, moisture-retaining, calcium-rich = cotton) vs Laterite (acidic, iron-rich, leached = plantation crops). Link to zone geography and UPSC schemes (Soil Health Card).
Introduction: Soil type is one of the key classifying parameters for agro-climatic zones. Two of India's most agriculturally significant soil types — black cotton (Regur) and red laterite — represent contrasting agro-climatic conditions and agricultural potential.
Role of Soils in ACZ Determination:
• Soil determines water-holding capacity → influences LGP → determines crop suitability
• Soil chemistry (pH, nutrients) shapes fertiliser requirements and organic farming potential
• Soil erosion vulnerability determines watershed management priorities in each zone
Black Cotton Soil (Regur) — Zones 9 & 13 (Western Plateau, Gujarat):
• Origin: Volcanic (Deccan Trap basalt weathering)
• Properties: High clay content (montmorillonite); self-ploughing (shrinks in dry, swells in wet); moisture-retaining; rich in Ca, Mg, K; pH 7.5–8.5
• Agricultural potential: Ideal for cotton, sorghum (jowar), tur (pigeon pea), soybean; less need for irrigation (moisture retention); Maharashtra and Gujarat thrive on this soil
• Limitation: Sticky and difficult to work when wet; poor drainage → waterlogging
Red Laterite Soils — Zones 7, 10, 12:
• Origin: Intense weathering in high-rainfall areas (leaching of silica)
• Properties: Iron and aluminium oxides give reddish colour; acidic (pH 5–6); porous; low fertility (nutrients leached); requires heavy manuring
• Agricultural potential (Zone 12): Excellent for plantation crops — coconut, cashew, rubber, tea, coffee; these crops tolerate acidic soil and high rainfall
• Agricultural potential (Zones 7, 10): Rice in valleys; millets and pulses on uplands; low productivity without inputs
Comparison:
• Moisture: Regur retains water; laterite is porous and drains quickly
• Crop type: Regur → cotton; laterite → plantation crops
• Productivity: Regur is inherently more fertile; laterite requires organic inputs
• Irrigation: Regur reduces irrigation needs; laterite in high-rainfall zones compensates
Policy Connection: Soil Health Card Scheme (2015) aims to map and address zone-specific soil deficiencies. NMNF promotes organic inputs to restore laterite soil fertility in Zones 7 and 12.
Conclusion: Soil type is not merely a physical parameter — it is the foundation of agro-climatic identity. Regur and laterite soils represent two distinct agricultural civilisations within India's geographical diversity.
Role of Soils in ACZ Determination:
• Soil determines water-holding capacity → influences LGP → determines crop suitability
• Soil chemistry (pH, nutrients) shapes fertiliser requirements and organic farming potential
• Soil erosion vulnerability determines watershed management priorities in each zone
Black Cotton Soil (Regur) — Zones 9 & 13 (Western Plateau, Gujarat):
• Origin: Volcanic (Deccan Trap basalt weathering)
• Properties: High clay content (montmorillonite); self-ploughing (shrinks in dry, swells in wet); moisture-retaining; rich in Ca, Mg, K; pH 7.5–8.5
• Agricultural potential: Ideal for cotton, sorghum (jowar), tur (pigeon pea), soybean; less need for irrigation (moisture retention); Maharashtra and Gujarat thrive on this soil
• Limitation: Sticky and difficult to work when wet; poor drainage → waterlogging
Red Laterite Soils — Zones 7, 10, 12:
• Origin: Intense weathering in high-rainfall areas (leaching of silica)
• Properties: Iron and aluminium oxides give reddish colour; acidic (pH 5–6); porous; low fertility (nutrients leached); requires heavy manuring
• Agricultural potential (Zone 12): Excellent for plantation crops — coconut, cashew, rubber, tea, coffee; these crops tolerate acidic soil and high rainfall
• Agricultural potential (Zones 7, 10): Rice in valleys; millets and pulses on uplands; low productivity without inputs
Comparison:
• Moisture: Regur retains water; laterite is porous and drains quickly
• Crop type: Regur → cotton; laterite → plantation crops
• Productivity: Regur is inherently more fertile; laterite requires organic inputs
• Irrigation: Regur reduces irrigation needs; laterite in high-rainfall zones compensates
Policy Connection: Soil Health Card Scheme (2015) aims to map and address zone-specific soil deficiencies. NMNF promotes organic inputs to restore laterite soil fertility in Zones 7 and 12.
Conclusion: Soil type is not merely a physical parameter — it is the foundation of agro-climatic identity. Regur and laterite soils represent two distinct agricultural civilisations within India's geographical diversity.
9. Practice MCQs — Agro-Climatic Zones (5 Questions)
Click on your answer. Correct answers highlight in green; wrong in red. Explanation appears immediately:
Q 1
How many major agro-climatic zones has India been divided into by the Planning Commission?
India has been divided into 15 major agro-climatic zones by the Planning Commission (now NITI Aayog) in 1989, in association with the National Remote Sensing Agency (NRSA). These 15 zones are further divided into 72 sub-zones. ICAR recognises 20 agro-ecological regions — do not confuse the two.
Q 2
Which of the following best defines an "Agro-Climatic Zone"?
An Agro-Climatic Zone (ACZ) is a land unit in terms of major climates, suitable for a certain range of crops and cultivars. It is essentially an extension of climate classification keeping in view suitability to agriculture. Note: it does NOT include landform — that is added in Agro-Ecological Zones (AEZ).
Q 3
Saffron cultivation in India is predominantly associated with which agro-climatic zone?
Saffron is grown in the Western Himalayan Region (Zone 1), specifically in the Karewas (lacustrine deposits) of Kashmir. Kashmir Saffron received a Geographical Indication (GI) tag in 2020. It requires a specific combination of cool climate, well-drained karewa soils, and moderate rainfall — unique to this zone.
Q 4
The Eastern Coastal Plains region (Zone 11) of India is unique because it receives rainfall primarily from which source?
Zone 11 (Tamil Nadu and Andhra Pradesh coastal region) is unique in India because it receives most of its rainfall from the North-East (Retreating) Monsoon during October–December. The rest of India depends on the SW Monsoon. This is a critical distinction — Tamil Nadu's kharif season aligns differently from peninsular India's pattern.
Q 5
Black cotton soil (Regur) is most characteristic of which agro-climatic zones?
Black cotton soil (Regur) is formed from volcanic (Deccan Trap) basalt and is found in the Deccan Plateau region (Zone 9 — Vidarbha/Marathwada) and Gujarat (Zone 13). It is ideal for cotton cultivation due to its high moisture retention and calcium content. These zones produce the bulk of India's cotton. Maharashtra's Vidarbha region is known as the "Cotton Bowl."
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