在毛主席“以粮为纲,全面发展”的方针指引下,金山县张埝公社秦山大队贫下中农,为革命科学种瓜闯高产,1975年53亩西瓜平均亩产超过了万斤。他们在肥水管理方面主要经验是: 一、开深沟,降低地下水。近年来,他们改浅沟为深沟,改畦中种为畦两边墩种, Under the guideline of “taking grain as the key link and all-round development” of Chairman Mao, Qinshan County’s Zhang Qun Commune Qinshan Brigade, a poor middle peasant, raided a high yield for revolutionary science. In 1975, the average yield per mu of 53 mu of watermelons exceeded 10,000 kilos. Their main experience in fertilizer and water management is: First, open ditch, reduce groundwater. In recent years, they changed Shallow ditch into deep furrows, changed their species into ridges on both sides,