HYDROGEL AND EFFICIENCY OF MINERAL FERTILIZERSON THE CHERNOZEM ORDINARYOF THE CENTRAL CISCAUCASIA
Аs a result of many years of research (2012-2019) on ordinary chernozems in the conditions of the Central Caucasus, where the factors limiting the production of stable crops of agricultural crops are the water availability of plants and the level of application of fertilizers, a positive mutual influence of hydrogel and full mineral fertilizer (N60P60K60) on their effectiveness was established. The maximum increase in production for an average of 7 years from the annual application of N60P60K60 was obtained against the background of a single application of hydrogel at a dose of 400 kg/ha and amounted to 2.02-2.14 thousand grain units/hectare, depending on the treatment method. The yield of cultivated crops when applying hydrogel depended on the use of fertilizers. On a non-fertilized background the increase in production from hydrogel reached 0.43 (300 kg/ha of hydrogel) - 0.88 thousand grain units/hectare (400 kg/ha of hydrogel), while on a fertilized one - 1.7-1.9 times more (0.74-1.68 thousand grain units/hectare).