total soil N 第1页

Root System and Organic Carbon Distributions in Soil Profiles of Several Plantations of Northern Slope of Qinling Mountains Nitrogen Content in Soil Particulate Fraction and Its Relationship to the Elevation and the Vegetation Differences in soil organic carbon and total nitrogen and their impact factors under different restoration patterns in the Loess Plateau. SOIL MICROBIAL ACTIVITY AND BIOMASS C AND N CONTENT IN THREE TYPICAL ECOSYSTEMS IN QILIAN MOUNTAINS, CHINA