Agrochemical indicators of soddy-podzolic soil in the crop rotations when the application of different doses of fertilizers
On loamy soddy-podzolic soil in the Northern part of the non-Chernozem zone of application the minimum and estimated doses of fertilizers in crop rotation in an average of 20 years of research 3.1-3.9 t feed unit/ha/year was resulted. When planning a negative balance of potassium and annual application of potassium fertilizer dose K60-90 in the arable horizon of the soil was increased content of mobile forms of 26 mg/kg to 1 <sup>st</sup> class suitability. When phosphorous fertilizers P30-42 element content in the soil has changed slightly.