Buchynskyy I. Crop capacity and seeds quality of spring rape varieties depending upon technological methods of growing in the conditions of Western Forest Steppe zone

Object of researches is the process of crop capacity formation and seed quality of spring rape under the influence of fertilizers application, seed inoculation by bacterial preparations and sowing terms in the conditions of the Western Forest Steppe Zone. The aim of researches was the establishment of regularity of crop capacity of spring rape in the conditions of the Western Forest Steppe Zone depending upon biological potential of experimented varieties, different fertilizers rates, seed inoculation by bacterial preparations and sowing terms. Besides it was necessary to determine the economic efficiency of experimented technological ways. Methods of research are field, calculative, visual, measuring-weighing, laboratory, mathematical-statistical, comparative-calculative. The thesis contains the research results of peculiarities of growing processes, development and forming of crop capacity of spring rape depending upon elements of growing technology, namely: rates of fertilizers application on different varieties, terms of sowing, seeds treatment by bacterial preparations "Ryzoagryn" and "Ryzoplan", the basis of which is highly efficient strains of fixing nitrogen and mobilizing phosphorus microorganisms and sowing at different terms. It is proposed the technology of spring rape growing of Kliff variety, which requires the sowing in early terms (1-20 of April), because of physical soil ripeness, fertilizers application at the rate of N150P90K150. Under low fertilizers rates (to N90P50K90), it should be the treatment of mixture preparations of "Ryzoagryn" and "Ryzoplan". Scientific researches went through production control in agro firms of Lviv, Ternopil, Rivne regions on the total square of 242 ha. The sphere of use is agriculture.