Effects of plant residues and nitrogen forms on microbial biomass and mineral nitrogen of soil in the Loess Plateau Effect of plant residues on soil acidity and its mechanisms A Preliminary Study of the Plant Residues in Peat and the Classification of Mineral Bodies of Peat Origins of soil organic carbon with the method of natural 13C abundance in maize fields Distribution character of aquatic plant residues and its nitrogen and phosphorus in the sediments in Nanhu Lake, Wuhan Effects of mixed plant residues from the Loess Plateau on microbial biomass carbon and nitrogen in soil Effects of leaf residue decomposition of cry1Ac-transgenic insect-resistant maize on community structure of soil animals PROCESSES OF PLANT RESIDUES DECAYING IN FIELD ECOSYSTEMS: FEATURES OF ENERGETIC VARIATION OF DECAYING SUBSTANCE Effects of plant residues on soil structure Decomposition of Plant Residue as Influenced by its Lignin and N Itrogen Organic carbon mineralization affected by water content and plant residues in purple paddy soil