Assessment of Nmin in a field experiment with mineral fertilizer and manure on leached smolniza
1997
Vladeva, Dilana (N. Poushkarov Research Institute of Soil Science and Agroecology, Sofia (Bulgaria))
In a field experiment carried out on leached smolniza with increased inputs of organic manure and reduced inputs of mineral nitrogenous fertiliser were measured the ammonium and nitrate contents in soil samples taken from a depth of 0-60 cm. The relatively surplus of ammonium nitrogen mineralised from manure in the treatments with manure-fertiliser doesn't exceed this form the treatments with mineral fertilization. The results show that the substitution of a part of the mineral nitrogenous fertilizer for manure, applied to corn on leached smolniza does not lead to decrease available nitrogen amounts for plants
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