To study the soil nutrient characteristics and zoning of tobacco planting area in Xiangxi,Using the method of combining GPS and fuzzy c-means clustering,management zoning of main nutrients of tobacco planting soil in Xiangxi,Hunan province.The results show that:(1)The content of organic matter in soil of Xiangxi was high,the content of effective phosphorus was very high,and the content of total nitrogen,alkaline nitrogen and available potassium were medium level,all the above nutrient indexes showed moderate variation.(2)Through correlation analysis and screening,organic matter,total nitrogen,...