Effect of Fertilizers and Plant Residues on the Fertility of Soil and the Yield and Chemical Composition of Grain Crops

摘要

The high efficiency of plant residues with a high C:N ratio applied in combination with high rates of mineral fertilizers was shown in a field experiment on gray forest soil. It was found that the application of minimum fertilizer rates N30P20K30 had a stable effect only without plowing of plant residues into the soil. Their regular incorporation into the soil changed the chemical composition of plants, affected the removal of nutrients with crop yield, and favored the maintenance of soil fertility.