Role of soil resources, mineral nutrition and symbiotic nitrogen fixation for increase of plant productivity

The problems of intensification of productive process of agricultural plants in conditions of increased anthropogenic loading on agrophytocenosis were considered. On the date of long-term observations the role of soil resources in mobilization of nitrogen, phosphorus and potassium by the plants of corn crops was analyzed. The productivity of corn crops in connection with soil type was investigated. The intensity of nitrogen immobilization during vegetal remains introduction to soil before the sowing of corn and vegetable crops was estimated. The fractional content of soil phosphorus under the influence of application of different form of phosphoric fertilizations was characterized. The role of macrosymbionts genotype for improvement of nitric nutrition of plants was described. It was shown, that the intension of nitrogen mobilization on chernozem soil was about 1,5 times as great as on turf-podzolic and gray forest soils. It was established, that nitrogen mobilization is raised if to grow the crops, which have the vegetal remains with C:N