Main Nutrient Status of Tobacco-planting Soil in Baoji and Fertilization Suggestions

The author analyzed the main nutrients of 207 soil samples from major tobacco-planting counties in Baoji.The results indicated that the average organic matter content in the soil was 13.68 g/kg,which was at an appropriate level as a whole.The total nitrogen,available nitrogen,total phosphorus,total potassium and available potassium contents were generally at a suitable or higher level.The available phosphorus was relatively deficient,and 96.6% of soil samples was of phosphorus deficiency.There were extremely significantly positive correlations among soil nutrient contents.Moreover,this article presented some corresponding improvement measures according to the status of soil fertility.