Effects of long-term fertilization on the availability of K adsorbed byclay minerals and profile distribution in brown soil Temporal and spatial dynamics of enzyme activities under long-term fertilization in a maize growing brown soil Vertical distribution and storage of soil organic carbon under long-term fertilization Effect of phosphorus on arsenic adorption by three different soils Effect of long-term plastic film mulching and fertilization on exchangeable calcium and magnesium contents in brown earth Effects of long-term fertilization on forms of Fe and Mn and their distributions in soil profiles Effect of different land use systems on the form and distribution of organic nitrogen in brown soil The warning research of soil enzyme activities on heavy metal-contamination of brown earth in Shandong Effect of the application of pig manure on structural characteristics of fulvic acids in brown soil Effect of biochar on physicochemical properties of red and yellow brown soils in the South China Region ANALYSIS OF SATURATED SOIL HYDRAULIC CONDUCTIVITY OF MOUNTAIN BROWN EARTH AND ELUVIAL CINNAMON SOIL IN BEIJING XISHAN STUDIES ON THE STANDARD PROFILES OF CRYO-BROWN SOIL IN THE NORTH AREA OF DAXING‘ ANLING MOUNTAIN