Physico-mechanical characteristics of the soil

The physico-mechanical characteristics of the soil determine directly its technological properties. They depend particularly on the grain-size, moisture, structure, and also on the human content and cationic composition of the soil colloidal complex. The most important technological characteristics of the soil are as follows  

The adhesion is manifested by the soil sticking to the surface of working tools and it is due to attractive forces between soil particles and surfaces of such tools. It depends on the grain size and soil moisture. In loamy to clay soils it increases with increasing moisture after exceeding the lower limit of plasticity it again decreases. 

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