目前我国已经确定了“九五”期间新型农用机械六大开发重占，一、联合作业机：我国现在采用的常规耕作技术和农机，易使耕地形成较坚硬的“犁底层”，阻碍上下水流通，不利于土壤吸水保墒。运用联合作业机可消除“犁底层”，让植物根系自由地向下生长。同时，联合作业的耕、播? At present, our country has already identified the six major re-appropriations for new agricultural machinery during the Ninth Five-year Plan period. First, the joint operation machines: the conventional farming techniques and agricultural machinery currently used in our country make it easier to create a harder “plow” Circulation, is not conducive to soil moisture and soil moisture. The use of a combined working machine eliminates the “plow” and allows the plant’s roots to grow freely down. At the same time, the joint operation of farming, broadcasting?