Scientific Journal of KubSAU

The efficiency of mineral and bacterial fertilizers ap-plication for various agricultural crops (watermelon, soy bean, millet and potato) is investigated in the Rostov region. We established the bacteria stocks un-der each culture, allowing to receive the greatest in-creasing of productivity, both on a natural background of fertility, and in a combination with mineral fertiliz-ers: for soy bean - 626а, watermelon - Azorizin-8, millet - Azorizin-6, potato - 18-5. The optimum com-binations of mineral and bacterial fertilizers for each culture are established

The results of studying of winter wheat fertilization in dark chestnut soil in 2008-2011 have been analyzed. Productivity of a winter wheat raised on 37,6-40,5 % under influence of both terms combination of fertilizers application that exceeded the sum of effects from each of them separately. Differences in winter wheat productivity depending on the structure of three-component complex fertilizers were not essential

Distinctions of soil under a winter wheat after a winter wheat and common sainfoin in provision of moisture and feed elements are revealed. Influence of autumn application of complete fertilizer and spring nitric dosage compensations on productivity and quality of a winter wheat are established; dependence of fertilizers’ effect from nitrate nitrogen contents in the soil is shown. Optimum dozes combinations on both predecessors are found