| 摘要 |
PROBLEM TO BE SOLVED: To perform extremely shallow depth regulation of the field surface for weeding, etc. SOLUTION: A tractor liftably attaches a tilling device 2 having tillage tines 1 to the back of the body of a tractor and automatically lifts and lowers the tilling device 2 by transmitting the detection result obtained by a tillage depth detection means of the tilling device 2 to the tractor-side tillage depth regulating device C. The tractor is provided with a first tillage depth detection means 50 to detect the vertical motion of a rear cover 3 relative to the tillage cover 24 of the tilling device 2, and a second tillage depth detection means 51 to detect the vertical motion of a leveller 4 connected to the lower end of the rear cover 3 in a vertically movable manner. The tillage depth regulating device C is provided with a selection means to receive the detection result of either one of the first tillage depth detection means 50 or the second tillage depth detection means 51. COPYRIGHT: (C)2009,JPO&INPIT
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