新中国成立以来，土壤科学的研究及其在农业生产实践中的应用得到了很大的发展，这对促进我国国民经济发展起到了重要作用。特别在粮食生产的发展方面，尤为突出。若以全国粮食总产量作为农业发展的主要指标，以每增加１０００亿ｋｇ粮食作为一个阶段，除其他社会、经济因... Since the founding of new China, soil science research and its application in agricultural production has been greatly developed, which has played an important role in promoting the development of our national economy. In particular, the development of food production is particularly prominent. If the total grain output as the main indicator of agricultural development, with an additional 100 billion kg of grain as a stage, in addition to other social, economic ...