Bringing both mineral and natural fertilizers into soil is the basis for obtaining satisfactory crops. In practice, farms carry out highly diversified fertilizing management, dependent not only on nutritional needs of plants, but also taking into account environment protection requirements. Considering the last aspect, farms should make efforts to introduce rational fertilizing management, resulting in correct balance of basic macroelements: nitrogen, phosphorus and potassium. Raised balance, but also too low one, maintained for extended time, may result in deterioration of soil environment.