黄河下游平原地区是我国栽培粮食和棉花的主要基地。解放以后,在党的领导和广大农民群众的努力下,新建和整修了很多灌区,灌溉面积有了很大的发展,特别是经过1957—1958两年冬春的水利化运动的高潮,不少地区已经基本上实现了水利化,而且很大部分是引河水的自流灌溉,它保证了粮棉产量成倍地增 The lower Yellow River Plain is the main base for growing grain and cotton in our country. After the liberation, under the leadership of the party and the efforts of peasants and masses, many irrigated areas were newly built and renovated, and the irrigated area has greatly developed. Especially after the climax of the water conservancy movement in winter and spring of 1957-1958, quite a few The region has basically realized water conservancy, and most of them are gravity-fed irrigated waters, which ensure a double increase in the output of grain and cotton