To maintain soil fertility, it is important to exploit the potential of soil conditioners in its entirety, as well as to correlate methods of soil conditioners` application with cultivation technologies for crops. For this it is important to alternate crops in crop rotation and to choose crops for planting such a way that the stock of organic matter in the form of crop and foliar remains is enough for the “work” of all the active substances of Vigus. This is ensured by using in crop rotation of perennial and annual legumes, perennial cereal grasses, legumes and corn for silage. The straw of cereal crops has a high coefficient of humification. In households with surpluses straw amounts, it is necessary to leave the straw in chopped or powdered form on the field, distributed throughout the field area and treated with Vigus (2-3 liters per 1 hectare). It should be done before plowing, and in the plowing process the powdered and treated straw is embedded in the soil. According to a number of institutions, it is important to cover with crop remains at least 30% of the cultivated soil. This is the way to reduce the destruction of humus. So cultivated fields follow the proportion: perennial grasses – at least 16-20% of arable land, legumes (peas, vetch, etc.) – at least 15-16%, pure fallows – at least 10%.