Nitrogen fertilization in organic crop rotations

Nitrogen fertilization in stock free organic farming systems can be provided by introducing green manure fertilization or legume crops as part of the total nitrogen needed in the rotation. Another valuable source is organic waste materials. We investigate the nitrogen effect to following crops by organic waste materials and legume crops.

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Fertilization of organic crop rotation with organic waste related fertilizers. Photo: Randi Seljåsen / NIBIO
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Incorporation of legumes residues as nitrogen source for following vegetable crops. Photo: Randi Sljaasen