平阳县的万全区和瑞安县的仙降区,位于飞云江南岸水綱平原地区,是浙南重要商品粮产区之一。仅据万全区統計,有垟心低产田15500余亩,多分布于畈心中部,地形部位較低,系浅海沉积物,土层深厚,质地匀細,保水保肥力强。由于过去水利失修,河道零乱,缺少灌排渠系,地下水位高,常易发生內涝旱災,土壤耕层以下常处于漬水还原状态,呈青灰色,加上不合理的耕种,长期进行冬耕晒白,缺少培肥管理,造成土壤僵硬閉結,速效养分少,作物生长不良,常年粮食产量仅在400~500斤。就其自然条件 Wanquan District in Pingyang County and Xianjiang District in Ruian County are located in the Plain Water Plain in the southern bank of Feiyun River and are one of the important commercial grain producing areas in south Zhejiang. According to Wanquan District’s statistics, there are more than 15,500 mu of low-yielding fields in the heart, distributed in the center of the heart, with low topography and shallow-sea sediments with deep soil layers, fine texture and strong water and fertility. Due to the past water conservancy, river disorder, the lack of irrigation and drainage system, groundwater level is high, often prone to waterlogging and drought, soil plow below often in the state of reduced waterlogging, blue-gray, with unreasonable cultivation, long-term winter Tilling cultivation, the lack of fertilizer management, resulting in soil stiff and closed, less available nutrients, poor crop growth, perennial grain output of 400 to 500 pounds. In its natural condition