Abstract
The effects of the root system of trees, shrubs and grasses on the hydraulic and physical properties of soil and their interrelation with increasing soil anti--scouribility by roots are quantitatively demonstrated in this paper for the first time. Based on the analysis of the leading factors of roots to increase the soil anti--scouribility, a mathematical model on increasing soil anti-scouribility by roots is established. The value in application of the model is to explain the mechanism of roots to increase the soil anti-scouribility and to evaluate the increasing effects of soil anti-scouribility by roots in different layers of soil The calculated results of the values in soil anti--scouribility intensified by roots at various intensities of rainfall and slopes of the model have higher precision, all of the mean maximum deviations between the estimated and observed values being less than 1.417 s/g.
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