Agriculture in India — Overview
India's agricultural significance:
- Agriculture employs ~45% of India's workforce
- Contributes ~18% of GDP (but declining as share of GDP)
- India is the world's 2nd largest agricultural producer
- Food security for 1.4 billion people
Two main cropping seasons:
| Season | Name | When | Key Crops |
|---|---|---|---|
| Kharif | Autumn/Monsoon | June–October | Rice, maize, cotton, groundnut, soybean, jute |
| Rabi | Winter/Spring | November–April | Wheat, barley, mustard, gram (chickpea), peas |
| Zaid | Summer | March–June | Watermelon, muskmelon, cucumber, fodder crops |
Tamil Nadu crop seasons:
- Kuruvai: June–September (short-duration rice — Cauvery delta)
- Samba: September–January (main season rice)
- Navarai: January–May (3rd season where water available)
- Mettur Dam opening (June 12) triggers Kuruvai cultivation in delta districts
Soil Types in India
Classification and Distribution
| Soil Type | Location | Key Crops | Special Features |
|---|---|---|---|
| Alluvial (most extensive) | Indo-Gangetic plain, river deltas (Cauvery, Godavari) | Wheat, rice, sugarcane, cotton | New alluvial = Khadar (fertile); Old alluvial = Bhangar |
| Black/Regur (cotton soil) | Deccan Trap — Maharashtra, MP, Karnataka, parts of TN | Cotton, jowar, groundnut | Formed from volcanic basalt; high clay, high moisture retention; cracks in summer |
| Red and Yellow | Tamil Nadu plateau, AP, Karnataka, Odisha | Groundnut, tobacco, rice (with irrigation) | Red from iron oxide; yellow from hydration of iron |
| Laterite | Western Ghats, Assam, Odisha hills | Tea, coffee, cashew, coconut | Leached by heavy rain; acidic; hardens in dry season |
| Arid/Desert | Rajasthan, Gujarat (Rann of Kutch) | Bajra, drought-resistant crops | Sandy; low organic matter; saline in Rann area |
| Mountain/Forest | Himalayas, Northeast India | Tea (Assam, Darjeeling) | Acidic; peaty in some Himalayan areas |
| Saline/Alkaline | Punjab, Haryana, UP, coastal areas | Reclamation needed | Caused by waterlogging, poor drainage, sea water intrusion |
Tamil Nadu soils:
- Red loam/sandy soil in the plains (most of interior)
- Black soil in Coimbatore, Tirunelveli districts
- Alluvial in Cauvery delta (Thanjavur, Tiruvarur, Nagapattinam) — most fertile
- Laterite in Nilgiris, Kolli Hills
Major Crops of India — Regional Distribution
Food Crops
Rice:
- India = 2nd largest producer globally
- West Bengal, Uttar Pradesh, Punjab, Tamil Nadu, Andhra Pradesh
- Tamil Nadu: Cauvery delta = rice bowl; Samba variety; IR-20 (HYV)
Wheat:
- Punjab, Haryana, Uttar Pradesh (Green Revolution heartland)
- Rabi crop; needs winter cold and spring heat
Millets (Coarse grains):
- Jowar (sorghum): Maharashtra, Karnataka
- Bajra (pearl millet): Rajasthan, Gujarat
- Ragi (finger millet): Karnataka, Tamil Nadu — important in Tamil Nadu hill districts
Commercial Crops
Cotton:
- Maharashtra (largest), Gujarat, Punjab, Haryana, Coimbatore (TN) — India's 'Manchester'
- Black cotton soil (Deccan) is ideal
Sugarcane:
- UP (50%), Maharashtra, Tamil Nadu (Coimbatore, Tiruvarur)
- India = 2nd largest sugar producer globally
Groundnut:
- Gujarat (largest), Andhra Pradesh, Tamil Nadu
Jute:
- West Bengal (90%) — 'golden fibre'; grows in Hugli basin
Green Revolution
Period: Mid-1960s onward Father of Green Revolution in India: M.S. Swaminathan (Tamil Nadu) Global: Norman Borlaug (Nobel Peace Prize 1970)
Components:
- HYV (High Yielding Variety) seeds: Sonalika (wheat), IR-8 (rice — 'miracle rice')
- Chemical fertilisers (urea, DAP)
- Pesticides and herbicides
- Irrigation expansion
- Agricultural credit and procurement (MSP)
Minimum Support Price (MSP):
- Government announces MSP for 23 crops before each season
- Guarantees floor price to farmers — protects from market crash
- Procurement at MSP by government agencies (Food Corporation of India — FCI for rice/wheat)
Second Green Revolution:
- Focus on eastern India, Northeast
- Pulses and oilseeds revolution
- BGREI scheme, Pradhan Mantri Krishi Sinchai Yojana
Mineral Resources
Ferrous Minerals (Iron-bearing)
Iron Ore:
- India = 4th largest crude steel producer
- Major deposits: Odisha (Sundargarh, Keonjhar, Mayurbhanj), Jharkhand (Singhbhum), Karnataka (Bellary-Hospet-Sandur), Chhattisgarh (Bailadila), Goa
Manganese:
- Used in steel production
- Odisha (largest), Karnataka, Madhya Pradesh, Maharashtra
Non-Ferrous Minerals
Bauxite (Aluminium ore):
- Odisha (largest — Panchpat Mali), Jharkhand, Gujarat, Maharashtra
Copper:
- Rajasthan (Khetri — famous copper mine), Jharkhand (Singhbhum), Madhya Pradesh (Balaghat)
Gold:
- Karnataka (Kolar Gold Fields — now mostly exhausted; Hutti Gold Mine still active)
Lead and Zinc:
- Rajasthan (Zawar mines near Udaipur — world's 4th largest)
Energy Minerals
Coal:
- India = 5th largest coal reserves
- Main coalfields: Gondwana coalfields (Jharkhand, Odisha, West Bengal, MP, AP) — 98% of reserves
- Jharkhand: Jharia (most important), Bokaro, Karanpura
- West Bengal: Raniganj (oldest coal mine)
- Types: Anthracite (best), Bituminous, Lignite (worst quality)
Petroleum and Natural Gas:
- Mumbai High (offshore — largest oil field)
- Gujarat (Ankleshwar, Kalol)
- Assam (Digboi — oldest oil refinery in Asia)
- Tamil Nadu: Cauvery offshore; ONGC operations at Nagapattinam
- ONGC = Oil and Natural Gas Corporation (PSU)
Tamil Nadu minerals:
- Magnesite (Salem district — largest producer in India)
- Limestone (Ariyalur, Tirunelveli — for cement)
- Granite (Salem, Namakkal, Krishnagiri)
- Mica, Feldspar, Quartz
Energy Resources
Conventional Energy
| Source | India's status | Key states |
|---|---|---|
| Thermal (coal) | ~60% of electricity | All major states |
| Nuclear | ~3% of electricity | 22 reactors in 7 locations |
| Large hydro | ~10% of electricity | HP, Uttarakhand, Northeast, Kerala |
Nuclear Power Plants in India:
- Kudankulam (Tamil Nadu, 2x1000 MW) — Russia-assisted; VVER reactors
- Tarapur (Maharashtra) — India's first NPP (1969)
- Kaiga (Karnataka), Rawatbhata (Rajasthan), Narora (UP), Kalpakkam (Tamil Nadu — MAPS; also home to Fast Breeder Test Reactor)
Renewable Energy
India's renewable energy ambition: 500 GW renewable capacity by 2030
Solar energy:
- India = 3rd largest solar capacity globally (~80 GW+ as of 2024)
- Rajasthan = largest solar state (desert land)
- Tamil Nadu = 2nd or 3rd largest solar state (~16–20 GW)
- Tamil Nadu firsts: first wind farm at Muppandal (Tirunelveli) — now Asia's largest wind farm cluster
- Rewa Solar Plant (Madhya Pradesh): 750 MW — among largest single solar parks
Wind energy:
- India = 4th largest wind power producer
- Tamil Nadu: Muppandal (Tirunelveli), Aralvaimozhi — one of world's best wind corridors
- Gujarat: Kutch coast
- Rajasthan, Karnataka, Andhra Pradesh
Irrigation
Types
1. Canal irrigation — from dams and barrages; good for plains
2. Tank irrigation — traditional ponds; dominant in South India
3. Well/Tube well — groundwater; dominant in Punjab, Haryana, UP
- Cauvery delta (TN) — Mettur Dam → canals to Thanjavur/Tiruvarur/Nagapattinam
- Tamil Nadu: 39,000+ tanks; many British-era repairs needed
- Periyakulam tank (Theni), Chembarambakkam (Chennai water supply)
- Causes: groundwater depletion (Punjab critical), fluoride/arsenic contamination
Major Irrigation Projects
| Project | River | State | Purpose |
|---|---|---|---|
| Bhakra-Nangal | Sutlej | HP/Punjab | Green Revolution irrigation |
| Indira Gandhi Canal | Sutlej-Beas | Rajasthan | Desert irrigation |
| Nagarjuna Sagar | Krishna | Telangana/AP | Multi-state irrigation |
| Godavari-Krishna Link | Godavari, Krishna | AP, Telangana | Water transfer |
| Mettur Dam (Stanley) | Cauvery | Tamil Nadu | Delta irrigation |
| Parambikulam-Aliyar | Multiple rivers | Kerala-TN | Inter-state water sharing |
Board Exam Tips
- Alluvial soil = most extensive; Indo-Gangetic plain.
- Black cotton soil (Regur) = Deccan Trap; Maharashtra; ideal for cotton.
- Laterite soil = Western Ghats; cashew and tea.
- Green Revolution: M.S. Swaminathan (India); Norman Borlaug (global). HYV seeds, fertilisers, irrigation.
- Mettur Dam opens June 12 for Kuruvai rice season — extremely frequently asked in TNPSC.
- Coal: 5th largest reserves globally; Jharkhand = largest producer; Gondwana coalfields.
- Kudankulam NPP (Tamil Nadu), Kalpakkam (Tamil Nadu — MAPS + Fast Breeder).
- Muppandal (Tirunelveli) = Tamil Nadu's wind energy capital.
- Iron ore: Odisha, Jharkhand, Karnataka.
- Tamil Nadu minerals: Magnesite (Salem), Limestone (Ariyalur), Granite (Salem/Namakkal).
Frequently Asked Questions
Six major soil types in India: (1) Alluvial soil — most extensive; Indo-Gangetic plain + river deltas; very fertile; good for wheat, rice, sugarcane. (2) Black/Regur soil — Deccan Trap (Maharashtra, Madhya Pradesh, Karnataka); excellent for cotton (hence 'black cotton soil'); high moisture retention. (3) Red and Yellow soil — Deccan plateau (Tamil Nadu, AP, Odisha); poor nitrogen; good when irrigated. (4) Laterite soil — Western Ghats, Assam, Eastern Ghats; leached by heavy rain; low fertility; cashew and tea. (5) Arid/Desert soil — Rajasthan; sandy; low organic matter. (6) Forest/Mountain soil — Himalayan slopes, Northeast India; acidic; tea in Darjeeling/Assam.