Study on the effect of the green manure application on soil fertility

Abstract

The natural soil and climatic conditions of green manure crops are taken into account. It is important to choose the types suitable for growing them for different purposes (as a main, repeated crop, animal feed, mulching), to increase the yield and quality of green manure crops, to achieve high green biomass by using optimal seeding periods and rootstock thicknesses. One of the urgent tasks is to carry out research in the priority areas such as increasing the soil fertility and cotton yield by crushing the cultivated green biomass and spreading it evenly on the field, plowing it into the soil at different times and depths. In order to increase soil fertility, the use of pure bean and colza and their mixtures as green manure has increased. The percentage of macroaggregates in the driving layer before the first irrigation increased by 13.0-13.45% compared to the control, and by 16.55-17.4% before the last irrigation. As a result, the volume mass of the soil is reduced to 0.02-0.04 g/cm3, and the amount of nitrogen, phosphorus (P2O5) and exchangeable potassium (K2O) in the form of ammonium (N-NH4) and nitrate (N-NO3) in the soil is lower than in the control-green manure and caused a slight increase compared to the option.