Evaluation of soil fertility and crop rotation productivity in the steppe zone of middle Volga
The estimation of a condition of fertility of soil and efficiency of crop rotations for the forty-year period allows to solve a problem of stabilisation and stability of crops of agricultural crops in a zone of risky agriculture. It can achieve at the expense of development of adaptive-landscape system of the agriculture which all links are directed on overcomings of conditions of droughty agriculture. Adaptive зернопаропропашные and fodder crop rotations allow to achieve not only accepted, but also the expanded reproduction of fertility of soil to receive rather steady grain yields winter more than 3,0 т. Grains from hectares, summer grain 2,0-2,5 т., sunflower 0,7-0,95 т. Seeds, corn on a silo 15-17 т. From hectares. It is one of the best indicators of area and area of region of the Average Volga region