DATA ON THE C-TRANSFORMATION AND N-TRANSFORMATION DYNAMICS OF THE SOIL

The C- and N-transformation processes were measured over 11 days incub ation period under laboratory conditions in the calcareous sandy and c hernozem soil. The experiment was carried out with and without glucose carbon source under different N nutritional conditions. The CO2 produ ction and the ammonium- and nitrate-N content of the soil samples were determined from time to time during incubation. The glucose amendment resulted in the first two days period of net immobilization. Between the samplings on days 3 and 11 days the N immobilization and mineraliz ation processes were approximately of equal size. Soil samples CO2 pro duction incubated with glucose and different quantity of N-nutrient, r eached a high value already on the first two days of incubation. Later , the intensity of glucose decomposition was controlled by the rate of mineralization of the organic N-forms of the soil.