Agriculture and forestry

Bronnikova Lina Feodosiivna – Senior instructor at the Department of Agriculture, Soil Science and Agrochemistry of the Vinnytsia National Agrarian University (21008, Vinnytsya, 3, Solnychna St., e-mail: br_1_f@vsau.vin.ua).

In the article the results of estimation of forming of the nitric mode of soil are reflected depending on the system of mineral fertilizer at growing of corn on grain. The features of forming and accumulation of base forms of nitrogen are certain in soils at gradual complication of the system of fertilizer from the afteraction of organic fertilizers and onecomponent bringing consistently of phosphorus and potassium and use of the system of application of all microelements.

The features of accumulation of ammonia, nitrate and mineral nitrogen are certain in a top-soil on the basis of what drawn conclusion in relation to expediency of application separately phosphoric, potassium and fullcomponent fertilizers. The dynamics of nitric exchange is analysed in soil in the process of the physiology ripening of corn and conclusion in relation to expediency of late variants of adjustment of mineral feed due to the variants of the outroot additional fertilizing with the purpose of well-balanced necessity of corn on the late stages of the harvest forming are made.

The dynamics of forming of index of providing of soil nitrogen taking into account phasicness of development of plants of corn is appraised. The conclusions about expedience forms of fertilizer for providing productivity of the corn hybrids in the conditions of the economy are made.

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