To simultaneously perform a fertilizing work and a ridging work and lower a labor by adopting the fertilizing of a deep-nooted Welsh onion and the ridging work to a machine force.

This controller has a rotary tiller 3 in front of a traveling wheel 21 and a fertilizer 4 is provided at about just above the traveling wheel 21, then a tip 51a of a fertilizing hose 51 guiding the fertilizer drawn out from the fertilizer 4 is extended to a front side of a tilling cover 12 of the rotary tiller 3 to fertilize at the front end side of the rotary tiller 3.