Khokhlov V. Productivity of short-period crop rotation and fertility of sod-podzolic soil under different fertilization systems.

Object of the investigation is the process of forming of efficiency of agricultural crops in short-period crop rotation and fertility change of sod-podzolic soils under the influence of different manure systems. The aim of the work is determination of the means of biologization dy soil fertilization with green manure deans and oats and chaff ploughing when forming productive to of agricultural crops in short-period crop rotation in general. In the investigation field, laboratory, visual, analytical, scale-weighting, mathematic, statistic, comparative methods are applied. Five - and dual-course crop rotations with different soil fertility systems made agricultural technologies productive and economic effective. Possibility of substituting muck by vegetable manure - green manure and chaff, which provides forming of debt-neutral balance of humus with a yield from 1 ha of crop rotation area comprising 3,8 tons of grain units with the profitability of 100-190% is established. The results of the investigation are put into operation in such agricultural organizations in Zhytomyr region (general sguare 150 ha): j.v. "Zapovit" in Chervonoarmiysky district and j.v. "Vega Agro" in Brusylivskyi district. Field of applicant of the results of investigation is agricultural production.