PROBLEM TO BE SOLVED: To save labor of operation by dispersing fertilizer in a hole after being dug at the same time as the hole-digging operation. SOLUTION: The hole digger 12 is attached to the tip of a lifted and lowered arm 10 provided in the rear part of an implement, and has a fertilizer-feeding port 21 of a fertilizing device 20 for fertilizing the hole after being dug. A sensor 26 for sensing a presribed value of the depth dug by the digger 12 is provided, and a fertilizing delivery motor 23 is constituted so as to be synchronously driven based on the detected result of the sensor 26. COPYRIGHT: (C)2007,JPO&INPIT
