Efficiency of fertilizers in combined fields of soybean and com on leached chernozem of West Precaucasus

The influence of long-term application of fertilizers on agrochemical indexes of chernozem leached by combined soybean and com fields, yield green mass of maize-soy mixture and plants comsumption of elements of nutrition were learned under stationary experiment. It is proved that fertilizers applied into rotation increase productivity of com but don’t influence yield of soybean, and promote the lowering of soybean portion in yield of green mass of com-soybean mixture. It is determined that the lability of phosphates in soil and maintenance of labile phosphorus influence at most and positively the yield of green mass.