Veselova L. Reproduction of soil fertility under the influence of systems tillage and fertilizers in a crop rotation of the Steppe droughty the Crimea

The dissertation is devoted studying of long influence of systems of soil tillage in a combination to chemical and organo-chemical fertilizers, green fertilizer and straw on the basic agrophysical, biological and agrochemical indicators of the soil fertility, productivity of agricultural crops, economic and energy efficiency. By researches it is established that long application (14 years) in a crop rotation moldboardless resource-saving system of soil tillage in comparison with the differentdeep combined doesn't worsen the basic agrophysical indicators of fertility (density of addition of an arable layer, structurally-modular structure and water penetration), biological indicators (cellulose expansion ability, soil "breath", humus state soil, the content of seeds of weed plants in an arable layer and their viability), agrochemical indicators (the content of mobile phosphorus and exchange potassium). This allows restrict to economically and energetically favorable soil tillage using such tools as the PRN-31000, PCh-2,5, KPE-3,8, КРЕ-6, КТS-10-1 and provide stable yields of agricultural cultures. With such a combination is used effectively aftereffect of green manure and straw in the rotation, is provided by increasing the basic parameters of soil fertility with signs of enlarged reproduction.