上海郊区水田土壤,可以古岗为界分成东西两部分:浦东的沙泥、夹沙泥、黄泥头以及岗身的沟干泥是由长江沉积物发育起来的草甸土,地势较高(吴淞0.4米以上),地下水位较低(地面1米以下),质地偏中(轻壤—重壤),土壤通气孔隙较多,渗透性较好,因此土壤比较爽水,生产性能好,产量较高;浦西的青紫泥是由古太湖和其他许多湖荡港叉葑淤成陆的沼泽土,地势低洼(地面高程在吴淞零上2.2—3.5米),地下水位高(地面以 Paddy soil in the suburbs of Shanghai can be divided into two parts by the ancient hillock: sand, sand trap, yellow mud head and gangway mud in Pudong are the topsoil developed by the Yangtze River sediments, Wusong more than 0.4 meters), lower groundwater level (ground 1 meter below), the texture of the partial (light soil - heavy soil), soil aeration pore more permeability is better, so the soil is relatively cool water, good performance, yield High; Puxi blue purple mud is the ancient Taihu Lake and many other Lake Dalai fork forklift muddy land into the continent, low lying (the ground elevation in Wusong zero on the 2.2-3.5 meters), high water table ground