Profile characteristics or near-surface layer in farmland windbreak network region Soil Organic Carbon Profile Distribution of Rehabilitated Grasslands on the Opencast Coal Mine Dump of Loess Area Characteristics of soil pH and exchangeable acidity in red soil profile under different vegetation types. Profile distribution of enzyme activity of long-term fertilization soil and its dynamic characteristics Effect of long-term applying nitrogen fertilizer on the distribution of butrients of soil profiles in arid highland of the Loess Plateau Distribution characteristics of humus fraction in soil profile for the typical regions in the Loess Plateau Effects of long-term application of sulphur-containing chemical fertilizers on nutrients contents in paddy soils and their distributions in profiles Profile distribution characteristics of soil organic carbon in secondary forests in depressions between Karst hills Soil nitrogen contents and deep profile distributions in apple orchards of the Loess Plateau The profile distribution of FDA hydrolsis in paddy soils in Taihu region