METHOD FOR LAYER-BY-LAYER COMBINED TILLAGE OF SOIL

FIELD: agriculture, in particular, minimal tillage of soil for cultivation of farm crops on farm and home plots. ^ SUBSTANCE: method involves deep mellowing, disking and rotavation of surface layer by combining local deep mellowing of soil to 25-32 cm depth and disking by semi-helical mellowing by means of out-of-phase spherical half-disks of intermediate mid layer disposed at 14-32 cm depth and rotavation of upper layer by means of L-shaped knives to 8-12 cm depth, said processes being effectuated in single cycle. Disking is provided by shifting of layer under process at an angle of attack in direction opposite to direction of backward motion of unit by means of one "from the right to the left" type half disk and backward motion by means of other "from the left to the right" type half disk from mid portion of full width of paired half disks. Deep mellowing is provided along longitudinal axis of symmetry of tractor in front of one pair of paired half disks, which is united with L-shaped cutter knives, and along passage tracks of tractor propeller before batteries of two pairs of paired out-of-phase half disks. ^ EFFECT: improved quality of soil tillage, substantially reduced draft and stabilized depth of advancement of tillage tools in longitudinal-vertical plane of movement of tillage unit. ^ 1 dwg