FIELD: agriculture. SUBSTANCE: machine has frame 1, carrier-feeler wheels, working tool 2 for digging, lifting, moving and primary separation of soil root layer, working tool 3 for secondary separation of soil layer, and drive equipped with main reducer 4, safety clutch 5 and two loops 6,7 of toothed drive chain transmissions. Driving and driven shafts with cone gears of main reducer 4 are provided with auxiliary feeding shaft 28 connected to main feeding shaft through odd number of intermediate cylindrical gears with transmission ratio of 1:h1/h2, where h1 is rotational speed of power shaft of tractors with draft of class 3 and 4; h2 is rotational speed of power shaft of tractors with draft of class 5 and 6. Auxiliary feeding shaft 28 is positioned above main drive shaft provided with mechanism for adjusting clearance of cone gear pair mesh of main reducer. EFFECT: increased efficiency and enhanced reliability in operation of extraction tool drive. 2 cl, 10 dwg
