1中耕机凿形杆齿的改进普通台形杆齿在枯重土壤中作业时，工作阻力大，耕深难以保证，且易产生大土块，伤苗、埋苗。为此，我们对中耕凿形杆齿进行了改进。最初改进方法如图（a）所示，切下长15cm，宽6cm愿开沟圆片．焊在杆齿上作切主刀刃。但在个别板结严重地里，使用时中耕器 1 cultivator chisel rod gear teeth improvement Ordinary table-shaped gear teeth in heavy soil work, the work of resistance, difficult to guarantee the cultivation of deep, and easy to produce large soil, injury seedlings, buried seedlings. For this reason, we have improved the chisel rod. The initial improvement method shown in Figure (a), cut 15cm long, 6cm wide is willing to open the wafer. Welding rod on the main cut for cutting edge. However, in the individual compaction serious use of cultivators