| 247 soil samples selected from grain crop fields in Luoyang were examined.The results showed that the average contents of organic matter,total nitrogen,available phosphorus and available potassium were(1.25%,) 0.91 g/kg, 10.88 mg/kg,and 128.7 mg/kg,respectively. As a whole,the contents of organic matter and total N were low,the available P medium to low level,and the available K medium level.Frequency distribution of the contents of soil organic matter,total N,and available P appeared curves of deviating from normal distribution,which has left-deviating peaks,and the available K appeared an approximate normal distribution curve.The order of coefficient of variation(CV%) is available P > organic matter,total N > available K. |