一在六十年代初,我们曾经根据当时的土壤普查资料,初步总结了本省肥沃水田土壤的若干农业性状。并指出本省肥沃水田土壤的质地一般为重壤土到轻粘土,冬季地下水位应保持在2～3尺,土壤酸碱度应为中性到微酸性(pH 6—7),腐殖质含量多在2～4％,其碳氮比值多在8左右等等。十多年来,我省在毛主席革命路线指引下,普遍开展农业学大寨运动,农业生产有了新的发展,粮食单位面积产量大幅度地增长,高产田块的生产水平已从原来的每亩年产800斤左右提高到1600～2400斤。在这种新的情 In the early 1960s, we conducted a preliminary summary of several agricultural traits of fertile paddy soils in the province based on the current soil census data. It is also pointed out that the soil quality of fertile paddy fields in our province is generally heavy loam to light clay, and the groundwater level in winter should be kept at 2 ~ 3 feet. The soil pH should be neutral to slightly acidic (pH 6-7) and humus more than 2 ~ 4 %, Its carbon to nitrogen ratio more than about 8 and so on. In the past decade or so, under the guidance of Chairman Mao’s revolutionary line, our province has generally carried out the Dazhai Campaign in Agriculture and witnessed new developments in agricultural production. The output of grain per unit area has risen sharply. The production of high-yield plots has moved from the original Per mu yield 800 kilograms or so increased to 1600 ~ 2400 pounds. In this new love