Usyk S. 3 Agroecological substantiation of the saturation of short-term rotations with different feed grain crops in the Southern part of the Forest - Steppe zone of Ukraine

3 The object is 5-field crop rotations with a satiation different feed grain crops, podzolic chernozem; the aims– substantiation of the saturation of short-term rotations with different feed grain crops, which would provide their high performance and ecological safety of land-tenure; the methods – the field and laboratory; novelty – in the Southern part of the Forest - Steppe zone of Ukraine on podzolic chernozem generalized research on the study of 5-field crop rotations with a satiation different feed grain crops in an association with the basic technical crop of area – by a sugar beet; the results – according to the research results, crop rotations are recommended to be introduced into production with high substantiation of maize and barley at the simultaneous usage of increased manure norms or plowing into the soil of by-grain crops products for prevention of soil impoverishment on organic substance; the industry is agriculture