Justification of Organic Agriculture Parameters in Potato Growing With Economic and Marketing Evaluation

During research, positive influence of organic farming elements on economic efficiency of potato growing has been revealed. Combination of post-harvest oil radish siderate and deep tillage provided the highest yield of potato tubers -35.4 t ha-1 and starch isolation - 4.03 t ha-1. Weather conditions in research years influenced yield of potatoes greatly -the influence share was 74.6%. The use of green manure increases stress resistance of potato crops to limiting weather factors. On sidereal background, zone of optimum average daily temperatures during potato vegetation period increased from 190С to 20-210С, and optimum of precipitation amount decreased from 300 mm to 280 mm. Application of post-harvest oil radish siderate under conditions of unstable moisture in the Left Bank Forest Steppe and carrying out deep tillage of typical black soil at a depth of 28-30 cm for its covering, provides the highest economic yield -1615 € ha-1 and profitability level of potato growing - 77.6% at the lowest cost price of tubers - 68.68 € t-1.