chemistry of soil organic matter
The term soil organic matter (SOM), according to Stevenson, refers to the whole of the organic matter in soils, including the litter, the light fraction, the microbial biomass, the water‐soluble organics, and the stabilized organic matter (humus). The major components of SOM can be considered to consist of humid substances, saccharides and peptides, and products derived from recalcitrant materials. Polysaccharides are major aggregating agents in soils. Unless sterically protected, labile substances, such as simple sugars, amino acids, most proteins, and certain polysaccharides, decompose rapidly. The chapter is concerned with the presence of proteins, peptides, and amino acids in soil. It presents the structures and groupings of the amino acids commonly found in soil hydrolyzates, and provides concepts of shapes that are relevant in considerations of interactions of proteins and peptides with other soil components.
جهت استعلام قيمت و سفارش چاپ اين محصول لطفا با انتشارات گنج حضور تماس حاصل فرماييد