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Crop rotation is a natural, cheap, and effective way of maintaining the fertility of soil. When you plant something, it takes up and deposits chemicals from the soil. Different plants take up and deposit different chemicals. Rotating the right crops, can almost eliminate the need for fertilization, as the successive crops supply much of the chemicals needed by the others. (Cotton is a good example of a crop that benefits by being part of a rotation system, Because it depletes soil of a number of nutrients very quickly. Without a rotation system or other form of fertilization, this crop might not be profitable, certainly not asprofitable, in the next growing season. Early American cotton farmers learned this lesson the hard way.

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14y ago

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