Dynamic Research on Soil Water and Fertility Condition After Mechanized Returning Corn Stalks Into the Soil

The influence of the various manure schedules on the soil moisture, NO^-₃-N, P, K, and organic matter in the soil with returning stalks into the soil and without returning stralks into the soil is studied. The effective manure schedule that meets the requirement of wheat growth is obtained from the tests in small block fields. Extensive field tests were then carried out and the positive influence of the mechanized returning stralks into the soil on the yield and the effectiveness of manure schedule were proved. Moreover, the yield increasing mechanism by the mechanized returning stralks into the soil was discussed.