Irshak R. Assortment of grass mixtures for grassing of erosive soils transformed from arable lands at conditions of western Forest-Steppe

Object of investigation - processes and legalities of formation of specific structure of legume - grass grass stands depending on methods of soil cultivacion, selection of grass mixtures rational fertilization and stimulators. Purpose - to reveal ecological-biological, phytocenosis and agrotechnical peculiarities of formation of high-productive soving cenosises and to elaborateand scientifically prove the economic expedient energy-saving and ecologic careless technologies its creation and rational ase for conditions Forest-Steppe Western on erosive lands. Methods of investigation: field, visual, measuring-weight, laboratorical-chemical, mathematical-statistic, calculatic-statistic. The results of investigation to questions study of formation of productivity of legume-grass grass mixtures depending on soil cultivation, mineral fertilizer and gravth stimulators on erosive lands withdrawed from arable land are taken out in thesis. There are proposed for rise yield and nutritive value of legume-grass grassstands to conduct before-soving soil cultivation after stubble predecessors vith rotary cultivator and application of mineral fertilizer of rate P60K90 vith before-soving preparation seed by microgumin. The results of scientificinvestigation are introduced in SFEF "Obroshyno" (Pustomyty distriet Lviv region) on area 25 ha and in SFEF "Grusyatychi" (Zhydachiv district Lviv region) on area 25 ha. Sphere of use-agriculture.