按照北京市政府第九阶段控制大气污染措施的要求,2003年全市计划实行保护性耕作面积3.33万公顷,其中春播玉米1万公顷,豆类666.7万公顷,夏玉米2万公顷,冬小麦2667公顷。其中1万公顷的春播作物免耕播种任务已经下达,涉及到12个区县30多个乡镇。截止到5月15日,春玉米免耕播种机300 According to the requirements of the ninth phase of the Beijing municipal government to control air pollution, the city plans to implement 33,300 hectares of protected tillage area in 2003, of which 10,000 hectares of spring corn, 6.667 million hectares of beans, 20,000 hectares of summer maize and 2,667 hectares of winter wheat. One million hectares of spring sowing no-till sowing task has been issued, involving 12 districts and counties more than 30 townships. As of May 15, spring corn no-till planter 300