Furmanets M. The influence of predecessors and fertilizers on the productivity of winter wheat in short-term rotations of the western Forest-Steppe of Ukraine

The subject of research is the process of winter wheat productivity formation and changes of main indices of the efficiency and fertility of dark grey podzolized soil under various fertilizer systems and predecessors in short-term crop rotations. The aim is to establish the ways of the increase of soil fertility, winter wheat grain yield and quality in short-term rotations depending on a forecrop and fertilizer systems of the biological direction, to define their role in providing with the needs of agricultural production for cheap organic fertilizer. The research methods are field, weight, chemical, statistical, computational and comparative. It is determined the influence of predecessors and fertilizer systems with the use of agriculture biologization components (the appliccation of mineral and organic fertilizers, straw burying, using afterharvest mustard planting for green manure) on the change of indices of the soil fertility, phytosanitary state of crops, winter wheat grain yield and quality formation. It is established the role of perennial grasses and maize for silage as the predecessors of winter wheat in short-term crop rotations. The research results in 2005, 2006 are introduced in the Rivne region over an area 65 and 20 ha. The field of application - the agricultural production.