Determining Method of Soil Drought Conditions to Loamy and Clay Soil in Heilongjiang Dry Area

The main soil types in Heilongjiang Province farmland are of white pulp soil,black soil,Chernozem,meadow soil.Those cover the various types of soil texture except sand soil.As seasonal frequent occurrence of drought,soil current drought degree needs to be discrimination rapidly and scientifically.In this study,acording the actual value of dry soil density,capacity soil moisture constant by weight,soil porosity with different soil in different layers,applying statistical analysis method,to solve the internal relations among the three index above.The results show that in the cultivated land of Heilongjiang Province the dry soil density was significant correlation to the soil porosity.The greater the dry soil density is,the smaller the soil porosity.The capacity soil moisture constant by weight is also emboding significant correlation.Thus determine the relationship of the dry soil density and moisture content by volume,and be generalized to easily determine the measured soil moisture by volume on behalf of the drought situation.