Organic waste products used as fertilizers

Organic vegetable production on stock-less farms has a need of various off-farm nutrient resources. The parts of agricultural co-streams that not can be used as food or feed are relevant to be used as fertilizers for those needs. Waste products with soil or certain animal residue compounds needs to be hygienized before use on agricultural land. This can be done through a composting process at high temperature or as part of the aimed processing or industrial treatment (e.g. bio-gas facilities) that produce the co- stream material.

Field experiment with organic waste related fertilizers, Nibio Landvik, Grimstad. Photo: Randi Seljåsen / NIBIO