皖南地处中亚热带北缘。红壤和水稻土是主要的土壤。在发生分类和肥力特性基础上,对其进行质量评价和数量统计,可为农林合理布局、因土制宜地发展亚热带特种经济林木,提供立地条件的科学依据。土壤资源评价,目前一般都是从单项评价到综合评价(以指数表示),使土壤资源质量评价从土壤个别 Wannan is located in the northern subtropics. Red soil and paddy soil are the main soils. On the basis of classification and fertility characteristics, the quality evaluation and quantitative statistics can provide reasonable layout for agriculture and forestry, and develop subtropical special economic trees according to the local conditions so as to provide a scientific basis for site conditions. Soil resources assessment, now generally from individual evaluation to comprehensive evaluation (in exponential), so that soil quality assessment of soil from individual