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.
Research has been focused also on co-streams from agricultural farming or food industry to be used as fertilizers. Our research within this topic has be related to utilization of anaerobic digested food waste, shrimp shell and macro algae meal in comparison with animal manure and mineral fertilizers.