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Rotation fertilization refers to a crop rotation system that uses nitrogen-fixing legumes to restore fertility to soils after heavy feeding crops like tomatoes or squash have been grown in the same field.

Legumes--beans, peas, vetch, and clover--have symbiotic Rhizobia bacteria that form colonies on their roots. The rhizobia bacteria can "fix" inorganic atmospheric nitrogen, putting it into a form that can be used by the plants. The bacteria provide nitrogen to fuel the plants' growth, and the plants produce sugars, starches, and amino acids to feed the bacteria. When the legumes are plowed under, the nitrogen they've fixed enters the soil ecosystem and enriches the soil for the next year's crop.

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14y ago

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