In this paper a mathematical model describing the main kinetics activa
ted during the degradation processes of organic matter added to soil i
s proposed. The model analyses the evolution, with time, of the biomas
s, total nitrogen, inorganic nitrogen, carbon and humus, describing th
eir interrelations. Some results have been compared to the experimenta
l data of a degradation process, in cultivated soil, of water-soluble
waste from olive processing. The model has been used to simulate kinet
ics resulting from perturbations caused by different CIN ratios. (C) 1
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