The intimate knowledge of soils involves the research of unitary complexes of morphological characters - aspects of color, constitution and structure of the soil profile. In order to link the soil to plant production, it is necessary to know the ecological characteristics of the soil type, the natural fertility and the recommendation regarding its use, i.e.: the assortment of cultivated plants; - soil works; fertilizers; improvement works. These are minimum data needed to be known for judicious use of the soil. All mechanized agricultural works are carried out depending on the physical-mechanical properties of the soil. All mechanized agricultural works are carried out depending on the physical-mechanical properties of the soil.