Ryabchuk O. The Agroecological assessment of fertilization systems of the grain and beet crop rotation of the Northern Forest-Steppe zone

The thesis highlights the integrated ecological assessment related to the effects of the long-term application of organic, mineral fertilizers and their combinations on the agroecosystem of dark grey podzolic soil under the conditions of the Northern Forest-Steppe zone of Ukraine. The author established the dependence of the optimal parameters and standard indices of the agrophysical, phytosanitary and biotic qualities of dark gray forest soil of the Northern Forest-steppe zone with the system of traditional and biological farming. For the Northern Forest-steppe zone of Ukraine the author also determines the spreading of dew worm in the arable layer as one of the indices of the soil biological activity under the integrated use of soil cultivation and biological farming. The increase in the recoupment of mineral fertilizers under the maximum application of biogenic elements of the plant by-produce to the biological rotation is determined. The scientifically substantiated recommendations to production related to biological farming are developed.