１９９１年以来宣威市土肥站组织开展了全市的有机肥料品种品质及资源分布调查工作。调查的目的主要是搞清各类有机肥料的总量、种类、养分含量、分布状况，在调查的基础上开发利用，为建设高产稳产农田、发展“两高一优”农业以及合理施肥提供可靠的科学依据。一、分类调... Since 1991, the Soil Fertility Station of Xuanwei City has conducted surveys on the quality and distribution of organic fertilizers throughout the city. The main purpose of the investigation is to find out the total amount, types, nutrient contents and distribution of various types of organic fertilizers, and to develop and utilize them on the basis of the survey so as to provide reliable and reliable information for the construction of high and stable farmland, development of “two high and one excellent” agriculture and reasonable fertilization The scientific basis. First, the classification tune ...