The article presents the results of the studies on the changes in the quantity, marketability and quality indicators of the potato crop under the influence of the application of organic mineral fertilizers and growth promoters in the post-forest brown soils of the Askeran region of the Artsakh Republic, in potato fields grown in arid conditions. Two-year research has revealed that although the one-time application of equivalent amounts of organic and mineral fertilizers equally affected the quantity, marketability and quality indicators of the potato crop, fractional or combined application of these fertilizers had a more beneficial effect on the specified indicators of potatoes than their one-time application. At the same time, the studies revealed that in the one-time and fractional applications of organomix and mineral fertilizers, as well as bio-liquid application variants, compared to the variant without fertilization, the content of nitrates increased by 45-115 mg/kg, but their amount in the potato crop is within the limits of marginal permissible density. (MPD) Due to the limitation and high cost of mineral fertilizers, fertilize the potato fields with organomix at the rate of 8 t/ha, 60% of which is in sowing and 40% with nutrition, first soak the potato planting material with a solution of bio-liquid (14 l/ha) 2-3 days before sowing and as a result, a potato crop of 350-360 c/ha will be ensured, with a high content of starch and ascorbic acid (vitamin C), which is proposed to be invested in agricultural production.

In post-forest, pebbly, carbonated, medium strength, brown soils of the foothill zone, where the annual rainfall is 531 mm (of which 111 mm falls in May and 13 mm in December), the humus content in the soil ranges from 3,5 to 4,5%, the average annual temperature is 11,8⁰ C, under dry conditions, the effect of introducing equivalent amounts of organo-mineral fertilizers and growth-promoting bio-liquid into the soil at different times on the growth, development, transition periods of phenological stages, intensity of potato tuber formation and yield of early potatoes was investigated. Experimental research has revealed the high efficiency of using a relatively small fractional amount of organomix (from sow and in the form of nutrition), and the full amount of bio-liquid in the form of soaking the planting material (3 days before planting), the same or more amount of one-time use, as well as equivalent amounts of mineral fertilizers accepted in the zone compared to the application.