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Best Management Practices – Legume Nitrogen Credits

Quick fact sheet to support crediting nitrogen from legume crops.

  • Nitrogen (N) credits from legumes are part of the Right Rate in 4R nutrient management.
  • Alfalfa, clovers, soybeans and dry beans can contribute all or part of the N needs of the following crop.
  • Legume residue has a high N content that will be release in the following cropping season.
  • Ignoring N from a previous legume crop may result in over-fertilization.
  • A preplant soil test will not detect N from a previous legume crop.
  • Legume crediting can be combined with other BMPs such as in-season soil testing or crop sensors to fine-tune N application rates.