The Three Cropping Seasons of India:
- 1. Kharif Season (Autumn / Monsoon Crops): Sown in June/July with the onset of the South-West monsoon; harvested in September/October. Major crops: Rice (Paddy), Maize, Jowar, Bajra, Cotton, Jute, Groundnut.
- 2. Rabi Season (Winter Crops): Sown in October/November (winter); harvested in March/April (spring). Major crops: Wheat, Barley, Gram, Mustard, Peas, Linseed. (Aided by Western Disturbances in North India).
- 3. Zaid Season (Summer Short Season): Sown in March; harvested in June (between Rabi and Kharif). Crops: Watermelons, cucumbers, fodder crops, vegetables.
Climatic & Soil Thresholds for Primary Foodgrains:
| Crop | Temperature Requirements | Annual Rainfall | Ideal Soil Type | Leading Producer States |
|---|---|---|---|---|
| Rice (Paddy, Staple of South & East) | $20^\circ - 32^\circ\text{C}$ (high heat, abundant sunshine) | $> 150 - 200\text{ cm}$ (needs standing water in fields during early growth) | Deep, clayey alluvial soils with impervious subsoil clay pan to retain standing water | West Bengal (Leading), Uttar Pradesh, Punjab, Andhra Pradesh |
| Wheat (Staple of North & West) | $10^\circ - 15^\circ\text{C}$ at sowing; $20^\circ - 25^\circ\text{C}$ during harvest (cool growing season, bright warm sunny harvest) | $50 - 100\text{ cm}$ (requires winter rain from Western Disturbances or tubewell irrigation) | Well-drained, fertile light clayey loams and alluvial soils | Uttar Pradesh (Leading), Punjab, Haryana, Madhya Pradesh |
| Millets (Jowar, Bajra, Ragi - Coarse Grains) | $25^\circ - 32^\circ\text{C}$ (high drought resistance) | $< 50\text{ cm}$ (can thrive in rain-fed semi-arid areas) | Inferior, shallow, sandy, black, or red loamy soils | Maharashtra (Jowar), Rajasthan (Bajra), Karnataka (Ragi) |