Shuvar I. Scientific principles of the increase in crop rotation productivity and of soil fertility in traditional and biological agriculture of the western Forest-Steppe zone of Ukraine

Agroecological and biological factors; ontogenetic processes of formation and achieving of crops' productivity and crop rotation in general; soil fertility and indicators of products' quality, depending on agrotechnologies. To form the scientific base of biological development of agriculture to work in the conditions of sufficient moistening of Forest-steppe zone of Ukraine, providing crop rotation productivity as 60-70 centner/hectare and high quality of products, reproduction of darkly-grey podzolized soil fertility and environment protection are the aims of the work. The following methods were user; i.e. field, calculation, laboratory, mathematic and statistic ones. Novelty of the work lies in the fact that for the first time regularities of farming and achieving of agricultural crops' potential, optimum parameters and factors (agrochemical, agrophysical and biological) to develop darkly-grey podzolized soil fertility in condition of biological agriculture are established; model of crop rotation productivity and computer program of fertility and rotation management with maximal use of biogenic elements of the second products of plant-grower in biological circulation are developed. Results are as follows: new direction of modern agriculture, i.e. biological development, is theoretically grounded and used in experiments. When applied in complex with optimum-minimal rates of mineral fertilizers in rotation, siderate of interrow crops and second products of plant growing in the system of differentiated tillage and integrated plant protection, in may provide productivity of 60-70 centner/hectare, self-supporting balance of darkly-grey podzolized soil humus and keep ecological equilibrium in agronomical ecological system. Mathematic models of crop rotation productivity in biological agriculture are developed, computer program "Automated work place of agronomist" ("AWP of "Agronomist") for efficient management of production process are worked out. Principles of biological development of agriculture at agrarian enterprises of the western regions of Ukraine on the area of more then 16,5 thousand hectares are introduced. Scientific statements, conclusions and suggestions, included in varios recommendations, became a sufficient constituent for the development of computer program "Automated work place of agronomist" ("AWP of "Agronomist") and are used for specialists' learning in agrarian educational establishments of the ІІІ-IV level of accreditation. Agriculture is the sphere of itsapplication.