| Western Himalayan Zone |
Himachal Pradesh, UP hills, J&K (3 sub-zones) |
Skeletal cold soils, podsols, hilly brown soils; steep slopes, erosion-prone |
| Eastern Himalayan Zone |
Arunachal Pradesh, Nagaland, Manipur, Tripura, Mizoram, Assam, Jalpaiguri & Coochbihar |
High rainfall, dense forests, alluvial soils; shifting cultivation; flood-prone |
| Lower Gangetic Plains Zone |
West Bengal |
High rainfall zone |
| Middle Gangetic Plains Zone |
Eastern Uttar Pradesh, Bihar |
Good groundwater potential; canals and tube wells |
| Upper Gangetic Plains Zone |
Western Uttar Pradesh |
Highly productive agricultural region |
| Trans-Gangetic Plains Zone |
Punjab, Haryana, Delhi, Chandigarh, Sri Ganganagar (Rajasthan) |
Highest net sown area, intensive irrigation, high crop intensity |
| Eastern Plateau & Hill Zone |
Eastern MP, South West Bengal, Inland Odisha |
Medium soil depth, undulating topography; tanks & tube wells |
| Central Plateau & Hill Zone |
Southern UP, Eastern Rajasthan, MP, Chhattisgarh |
Diverse soils and climatic conditions |
| Western Plateau & Hill Zone |
Maharashtra, parts of MP, one district of Rajasthan |
Only ~12.4% irrigated; canals are main source |
| Southern Plateau & Hill Zone |
Andhra Pradesh, Karnataka, Tamil Nadu |
Semi-arid climate |
| East Coast Plains & Ghats Zone |
East coast of Tamil Nadu, Andhra Pradesh, Odisha |
Alluvial soils & coastal sands; canal & tank irrigation |
| West Coast Plains & Ghats Zone |
Kerala, Karnataka, Goa, Maharashtra, West coast of TN |
Wide variation in soils, rainfall and cropping patterns |
| Gujarat Plains & Hills Zone |
19 districts of Gujarat |
Arid climate; well and tube-well irrigation |
| Western Zone |
9 districts of Rajasthan |
Hot desert climate; sandy soils; erratic rainfall; drought-prone |
| Island Zone |
Andaman & Nicobar Islands, Lakshadweep |
Equatorial climate; >300 cm rainfall; forest-dominated |
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