[Evolution of chemical properties of chernozem at Fundulea as a result of fertilizer application]
1994
Mihaila, V. | Hera, C. (Institutul de Cercetari pentru Cereale si Plante Tehnice, Fundulea (Romania))
After 26 years long term experiments on cambic chernozem, there were determined the pH, humus content, total nitrogen, mobile phosphorus and changeable potassium in soil by application of progressive rates of the nitrogen, phosphorus and potassium fertilizers. Evolution of these indices depending on the used rates was estimated according to regression line, some correlations being strongly significant. The rates at which the initial level of soil remained the same have been calculated and there has been established the formula for pH evolution, humus content, total nitrogen, mobile phosphorus and changeable potassium depending on the quantity of fertilizers used.
Показать больше [+] Меньше [-]