In this study, based on utilizing SOM diffusion translation decomposition model ,two soil profiles were selected in different vegetation zones at Dinghushan Mountain for quantitative studies on SOM dynamics and their controlling factors.

In order to understand the enrichment mechanism of heavy metals in soil particulate organic matter(POM),four chemical species of Cu and Pb in the POM,including exchangeable,complex,organic tightly bound and mineral bound,were characterized by chemical selective extraction.

A new pretreatment method-orthogonal signal correction (OSC) was presented to eliminate the influence of the noise on soil organic matter (SOM) content prediction.

The spatial variability of soil organic matter(SOM)in the Shiqu County was expressed by the spatial analytic approaches such as ordinary kriging(OK)on the basis of the software ArcGIS Desktop 9.

Results showed that continuous application of FYM increased SOM successively and eventually reached such a high level as 60g?kga?a(c)-1 in SOM content while maintaining high crop yield.

Characteristics of spatio-temporal changes of soil organic matter in typical fringe in Beijing for 25 years;

Spatial variability characteristics of farmland soil organic matter in Pinggu District,Beijing,China;

Adaptability of seven leguminous forages and improvement to soil organic matter content in Guangxia grapery;

Measurement and analysis of the content of organic matter of soil in Qiqihar area;

Influence of cryptogamic soil crusts on accumulation of soil organic matter in Gurbantunggut Desert,northern Xinjiang,China;

Soil organic matters(SOM) are important components in soil,and they would affect the physicochemical,chemical and biological properties of the soil directly or indirectly.

Based on 137Cs tracer method,the soil erosion rate,organic matters and heavy metals loss on the agricultural lands of Danjiangkou city,Hubei Province,were studied.