浙江省常年亩产粮食在400斤或300斤以下的低产田约有600多万亩,它们的分布以零星小片的为主,但集中连片、面积达千余亩或几千亩的大低产畈也不少。有些地区由于大面积低产畈的连片存在,可以形成一个低产区。虽然这样,在这些低产区或低产畈内,仍有高产田和低产田并存的现象。这说明各地水田的肥力和单位面积产量,都有不同程度的不平衡性。但是低产田面积的大小,仍和一个地区平均的肥力水平或耕作水平的高低有关。水网平原和海滨平原地区的肥力水平和耕作水平较高,因而低产田的面积及其占水田面积的比例都较低;丘陵河谷地区,由于自然条件和耕作 About 600 million mu of low-yielding fields in Zhejiang Province, with annual output of 400 kg or below 300 kg per mu, are mainly distributed in small sporadic patches but concentrated in contiguous areas with a low yield of more than 1000 mu or a few thousand mu畈 a lot of In some areas, a low-yielding area can be formed due to the contiguity of large-area, low-yielding 畈. In spite of this, within these low-yielding areas or low-yielding areas, there are still high-yielding and low-yielding fields. This shows that paddy fields around the fertility and yield per unit area, have different degrees of imbalance. However, the size of the low-yielding field is still related to the average fertility level of a region or the level of cultivation. The fertility level and farming level of water plain and coastal plains are relatively high, so the areas of low-yielding fields and their proportion of paddy fields are relatively low. Due to the natural conditions and farming practices in the hilly valley,