The systems of main soil processing and the summer rapeseed productivity in lixiviated black soil in Western part of fore-Caucasus region

The systems of the main soil processing of summer rapeseed were studied in VNIIMK in 2009-2011 during stationary trials of intertillage crop rotation. It was ascertained, that in lixiviated black soil of the western part of Fore-Caucasus region, in the zone of insufficient moisture during favourable in moistening years, the highest seed yield of rapeseed (1.72-1.96 t/ha) and oil yield (0.72-0. 80 t/ha) is formed with the help of the main soil processing (moldboard ploughing, small moldboard processing). In the case of unfavourable weather conditions during flo-rescence – the plumpness, the high seed- and oil yield of summer rapeseed is formed by superficial, small moldboard processing and boardless ploughing (0.98 and 0.39 t/ha). The moldboard ploughing and small moldboard soil pro-cessing provide the cutting of production costs up to 400-600 roubles per tonne, and the receipt of the net profit of 11.5-12.1 hundred roubles per hectare.