青浦县地处上海市西隅,地势低平,湖群密布,素称渔米之乡。全县耕地的95%为水旱交替耕作的水稻土。近十年来,由于治水改土等农业措施的不断加强,粮食产量已有较大幅度的增长,但从常是产量的变化(表1)可以看出,不论丰年或欠年,乡队之间的生产力是不 Qingpu County is located in the western corner of Shanghai, low-lying terrain, densely populated lake, known as the village of fishing rice. 95% of arable land in the county is paddy soil alternated between flood and drought. In the past decade, due to the continuous strengthening of agricultural measures such as water and soil improvement, the output of grain has increased by a very large margin. However, from the change of output (Table 1), it can be seen that, regardless of the harvest year or year, Productivity is not