Study on the Suitable Soil Moisture of Rotary Tillage in Paddy Fields

Abstract

In this study, the relation between soil moisture and the influence of harrowing is examined in connection with the dynamic properties of soil to clarify the suitable soil moisture of rotary tillage in rice fields.
The results obtained are as follows
In the succeeding soil of puddled wetland rice, the rotary tillage in the soil moisture of the range of pF 2.0 had a high rate of soil pulverization with low resistance. In the succeeding soil of barley, the tillage in the soil moisture extent of about pF 2.6 had a high rate of soil pulverization with low resistance.
In the succeeding soil of the paddy rice, the cone index increased as the soil dried, the tillage in the range of the cone index 6.0 kgf/cm² had a high rate of soil pulverization with low resistance. However, in the succeeding soil of barley, the cone index showed no change with drying, and the tillage in the same cone index showed a remarkable difference in the rate of soil pulverization and resistance.