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 different purposes (as a main, repeated crop, animal feed, mulching), increase yield quality crops, achieve high biomass by using optimal seeding periods rootstock thicknesses. One urgent tasks carry out research in priority areas such as increasing fertility cotton crushing cultivated spreading it evenly on field, plowing at times depths. In order fertility, use pure bean colza their mixtures has increased. percentage macroaggregates driving layer before first irrigation increased 13.0–13.45% compared control, 16.55–17.4% last irrigation. As result, volume mass reduced 0.02-0.04 g/cm 3 , amount nitrogen, phosphorus (P 2 O 5 ) exchangeable potassium (K O) form ammonium (N-NH 4 nitrate (N-NO lower than control-green caused slight option.