所谓“旱田”指的是没有灌溉条件或者灌溉条件很差的耕地。据统计我国水田面积约占全国总耕地面积的25.5%,水浇地占22.6%,旱田约占51.9%,三种耕地都分布在全国各地。北方旱田指的是位于年降水量在250mm 到650mm 左右的地域,具体分布在东北中部、西部,内蒙古东南部,长城沿线各地,黄河、淮河、海河中 The so-called “dry land” refers to cultivated land without irrigation conditions or poor irrigation conditions. According to statistics, paddy fields in China account for about 25.5% of the country’s total cultivated land, irrigated land accounts for 22.6% and dry land accounts for about 51.9%. All three types of cultivated land are distributed throughout the country. The northern upland refers to the area with an annual rainfall of 250mm to 650mm, with specific distribution in central and western Northeast China, southeastern Inner Mongolia, along the Great Wall, the Yellow River, the Huaihe River and the Haihe River