Principles of crop rotation
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1. Leguminous crops should be grown before non-leguminous crops.
2. Crops with tap roots (deep rooted like cotton) should be followed by those which have fibrous root system.
3. More exhaustive crops should be followed by less exhaustive crops.
4. Selection of crop should be based on need or demand.
5. Crops of same family should not be grown in succession because they act as alternate hosts for insect pests and diseases.
6. The selection of crops should suit farmers financial conditions.
7. The crop selected should also suit to the soil and climatic condition.
8. An ideal crop rotation must provide maximum employment to the farm family and labour, permits farm mechanization to ensure timely operations besides maintaining soil health.