丘陵山区一般缺雨少水,即便是降雨较多的季节,也常常由于水土流失严重,而遭受干旱。近年来,丘陵山区群众,经过长期的实践终于积累了一条蓄好天上水,即挖蓄水覆膜丰产沟法（以下简称丰产沟）保农业丰收的有效措施。据调查:在作物生长期间,丰产沟可有效利用降水量的８５%以上,从? In hilly and mountainous regions, there is generally a lack of rain and less water. Even in the season with heavy rainfall, the drought is often caused by the serious soil erosion. In recent years, the masses in the hilly and mountainous regions have finally accumulated an effective measure to save the harvest of Tianshui water, namely, the Fengcungou (Duguangou) Method of digging the waterlogged plastic film (hereinafter referred to as the Fengcungou) after a long period of practice. According to the survey: during crop growth, Fengkuanggou can effectively use more than 85% of precipitation, from?