Shifting cultivation: the swidden cycle
Swidden farming clears a small forest plot, crops it for a short time, then lets the forest grow back before returning.
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- Choose a plot. In north-east India this farming is called jhum. Land usually belongs to the village or clan. Elders decide which hillside is ready and each household is given a share.
- Cut the growth. In the dry months families cut the bush and smaller trees. The work is often done by groups who help each household in turn.
- Dry and burn. The dried cuttings are burnt just before the rains. Fire releases the nutrients held in the plants as ash. Firebreaks are cut to stop the burn spreading.
- Sow mixed crops. Seeds of many crops are sown together in the ash with a digging stick or hoe. A single jhum field may hold a dozen or more crops.
- Harvest in turn. Harvest is spread out. Maize and vegetables come first, rice or millet later, tubers last. Mixing crops spreads the risk if one fails.
- Leave fallow. Hill soil tires quickly, so after a short time the family moves to a new plot. The old one is not abandoned. It is resting.
- Forest regrows. Forest returns and restores the soil. The system works when the rest is long. When land is short and the fallow shrinks to a few years, yields fall.