土壤肥力是土壤学的核心,是农业科学研究的重要课题。查明土壤肥力水平,摸清其变化范围,找出土壤肥力级别间的差异及各营养状态间相关状况,为因地种植、因土施肥提供科学依据,是实现农业现代化不可缺少的一件工作。十多年来,我室对黑龙江省大部分地区土壤肥力都进行过测定,获得分析数据数千余个。现仅将1974～1977年四年间,测得的土壤有机质986个,全氮量1214个,水解氮 Soil fertility is the core of soil science and is an important issue in agricultural science research. Identifying the level of soil fertility, finding out the range of variation, finding out the difference between soil fertility levels and the related status among the nutritional status, providing a scientific basis for planting soil and fertilizing soil, which is an indispensable task in agricultural modernization . For more than a decade, our laboratory has measured soil fertility in most areas of Heilongjiang Province and obtained more than a thousand analytical data. Now only in the four years from 1974 to 1977, soil organic matter measured 986, 1214 total nitrogen, hydrolyzed nitrogen