The effect of soil porosity size distribution on integral energy content of water in different moisture slopes

The water required by the plant is provided through the porous environment of the soil around the root. Therefore, indicators such as soil texture and effective porosity have been defined to measure the amount of water available to the plant. The pore size determines water energy and the plant's ability to absorb moisture, which is evaluated in this article. Multivariate regression analysis between the integral energy of water in different ranges of humidity as the dependent variable and the indices of soil pore size distribution as the independent variable has been investigated. Due to the fact that none of the indices of the pore size distribution curve have a significant relationship with the integral energy value of water in the permanent wilting point, therefore, it was not possible to estimate this index using the indices of the pore size distribution curve. The results showed that the elongation index of soil pore size distribution curve is the only factor determining the amount of integral energy of water in different soil water contents.