Soil Nutrient Content and Distribution Characteristics in Tongguan County

Using the data from soil testing formula applying fertilizer project in Tongguan county in 2013,the p H value,contents of organic matter,available nitrogen,available phosphorus,available potassium were evaluated,and the spatial distribution characteristics were analyzed. The results showed that soil p H value was 8. 47,being alkaline,belonged to the weak variation. The organic matter,available nitrogen,available phosphorus and available potassium contents were 14. 56 g / kg,82. 02 mg / kg,16. 26 mg / kg and149. 98 mg / kg,the available phosphorus and available potassium contents were at the medium level,available nitrogen and organic matter contents were at the low fertility level. There were significant positive correlations among contents of soil nutrient elements,and significant negative correlation between contents of soil nutrient elements and p H value. From the aspect of spatial distribution,p H value gradually increased from south to north; the contents of organic matter and available nitrogen decreased from the south to the north,and the highest level in the southwest corner; the available phosphorus content were higher in northeast and southwest regions; the content of available phosphorus increased from northeast to southwest.