- Primitive Subsistence (Slash and Burn / Jhumming): Cultivating small patches using primitive digging sticks and family labor; soil fertility regenerates naturally.
- Intensive Subsistence: High labor input, heavy biochemical fertilizers, and intensive irrigation on tiny fragmented landholdings.
- Commercial / Plantation: Single crop grown over vast estates using capital investment and modern machinery (Tea in Assam, Coffee in Karnataka).
• Rabi: Sown in winter (Oct-Dec), harvested in summer (Apr-Jun) — Wheat, Barley, Mustard.
• Kharif: Sown with monsoon onset (Jun-Jul), harvested in autumn (Sep-Oct) — Paddy, Maize, Cotton.
• Zaid: Short summer season (Mar-Jun) — Watermelon, Cucumber, Vegetables.