Galasun Y. Changes of agro-physical peculiarities of chornozem opodzolic for the long-term fertilizers use in crop rotation of the Right-Bank Forest-Steppe Zone of Ukraine

Object - agro-physical condition of chornozem opodzolic under long-term application of various fertilizer rates and fertilization systems in field crop rotation. Purpose - to identify the effect of long-term application of various fertilization systems and fertilizer rates in field crop rotation on the change of indices of agro-physical properties of heavy loam chornozem opodzolic during a vegetative period, and to determine optimal levels of fertilizer intensity in crop rotation aimed at ensuring their stability. Methods - a long-term stationary trial, field and laboratory-analytical researches, chemical analyses of soil samples, methods of statistical data processing. Theoretical results - natural effect of long-term fertilizer application on seasonal agro-physical properties of chornozem opodzolic was determined, which made it possible to predict changes of its fertility, to evaluate the degree of degradation processes in the soil based on agro-physical properties, to choose optimal measures for their regulation; besides the expediency to use organic-mineral fertilization system with the intensity of a crop rotation area such as 9 t of manure and N45P68K36, was proved. Practical results - the data received can help create database of soil monitoring to exercise ecological control of proper land use; recommended fertilization system was introduced into production. Novelty - for the first time for heavy loam chornozem opodzolic of the Right-Bank Forest Steppe Zone of Ukraine the following was determined: parameters, nature and tendency of seasonal changes of agro-physical properties and structural-aggregate composition of the soil and water resistance of its aggregates under long-term application of various fertilization systems and fertilizer rates in field crop rotation; optimal levels of crop rotation intensity with organic and mineral fertilizers to ensure the stability of agro-physical condition of the soil and high crop productivity. Degree of application - the main results of the research work wereintroduced at agricultural enterprise 'Zhoda Ltd.", Dobrovelychkivka district, Kirovohrad region at the area of 348 hectares, in fields crop rotation of the experimental elite-seed farm "Nyva", Khrystynivka district, Cherkasy region at the area of 95 hectares. The field is scientific-educational and agriculture.