EN
In 2008–2010 field experiments were conducted at the Plant Breeding and Acclimatization Institute – National Research Institute, Department of Seed Science and Plant Protection in Bonin on the effect of soil-applied fertilization with the organic-mineral fertilizer Rosahumus on healthiness, quality and yielding of potato cultivar Irga. The results of performed studies revealed a profitable effect of soil-applied fertilization with Rosahumus, used at the doses of 3–5 kg/ha on total yield quantity, trade yield (tubers over 30 mm) and big tuber yield (tubers over 60 mm) comparing to control variant (experimental plots without mineral-organic fertilizer treatmes).