P adsorption capacity of the soil is positively correlated with its oxalate-extractable iron and aluminum and organic matter contents and negatively correlated with P adsorption saturation degree.
土壤的吸磷能力与土壤活性铁铝和有机质含量呈正相关，与磷吸持饱和度呈负相关。
2
The test results of 30 samples collected in 4 wells indicate that the abundance and extractable contents of organic matter in the coal measures are both high, n alkane possesses odd even predominance;