Manure is a relevant organic fertilizer. 10 Irrespective of the specific source and composition of manure, it contains substantial amounts of essential plant nutrients, in particular N in the form of NH 4-N, NO 3-N and urea, as well as P, S, Ca, Mg, B, Cu, Fe, Mn, Mo, and Zn. 2,111,112 Large portions of the major nutrient elements N, P and S are …Web