Abstract
The research was carried out to study the possibility of cultivating mohar as the 4th crop in the 3-field link of crop rotation in afterharvest sowing on dry land in the zone of insufficient moisture in Krasnodar Kray. The work was carried out in 2015-2017. The experimental scheme provided for the determination of the aftereffect of various methods of basic tillage for the predecessor (winter wheat): plowing by 22 ... 24 cm, superficial plowing by 6 ... 8 cm and zero. The soil is ordinary chernozem. In 2015, during the growing season of the crop (July – October), 101% of precipitation fell out of the average annual amount (82.5 mm); - 97 and 105%, respectively. The hydrothermal coefficient over the years in July ranged from 0.87 to 2.00; in August - from 0.65 to 0.23; in September - from 0.03 to 3.56, with its average annual values of 1.45; 0.51; 1.38 respectively. After harvesting wheat, the soil was twice cultivated to a depth of 6 ... 8 cm and rolled, which made it possible to preserve up to 16 mm of productive moisture in a layer of 0 ... 20 cm. The studied methods of the main tillage for winter wheat did not have a significant effect on the yield of mohar, which amounted to 0.50 tons per hectare of grain and 1.75 tons per hectare of hay (840 fodder units per hectare). At the same time, 3.30 tons per hectare of crop and root residues were additionally supplied to the soil. The stubble sowing of mohar provided 4.2 thousand rubles per hectare of conditional net income
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