EFFICIENCY OF IRRIGATION OF SPRING PLANTED POTATOES BY THE MODERN SPRINKLER IN THE SOUTH OF RUSSIA
The purpose of the researches is to study the efficiency of the scientifically proven modes of irrigation of spring planted potatoes watered by the modern sprinkler in the South of Russia. The researches were conducted in farms of Semikarakorsky district of Rostov region in 2014-2015. The irrigation mode recommended by the producers of the sprinklers was applied on test plots. Humidity level before watering was the main criterion to define the terms of irrigation on experimental plots. The high efficiency and economic feasibility of application of the scientifically proven modes of irrigation of potatoes under watering by modern sprinklers is determined. Profitability on experimental plots exceeded control indicators. Its greatest value was defined as 194% in OOO «Istok - 1 in 2014», and as 131% in a peasant farm «Yuzefov N. N.» in 2015. The maximum net income per unit of area was gained on the experimental plots. It was 359017.5 roubles in the peasant farm «Yuzefov N. N.» and 446979.4 roubles in OOO «Istok-1» in 2014 that has exceeded control indices to 38662.5 and 48431.8 roubles. The similar situation was also observed in 2015. The costs per hectare were higher on the experimental plots: in «Yuzefov N. N.» peasant farm to 26337.5 roubles and in OOO «Istok-1» to 36568.2 roubles in 2014; in «Yuzefov N. N.» peasant farm to 30691.3 roubles, in OOO “Istok-1” to 33589.0 roubles in 2015. The incurred costs were compensated by potato yield productivity that was higher on experimental plots than on test ones.