Crop rotation: The methods of crop production that ensures high yield.
It is the method of growing two or more varieties of crops on the same field in sequential seasons. A crop utilizes some particular nutrients in larger quantities from the soil. Then, if the same crop is grown in subsequent seasons those nutrients will get depleted in the soil. Therefore, crops having different nutrient requirements are rotated.
Example:Legumes which have nitrogen-fixing bacteria in their root nodules supply the soil with nitrogen.
Therefore, these legumes are rotated with nitrogen requiring cereals such as wheat and maize.
This method reduces the need of fertilizers,thus increasing the overall yield of crops.