Microorganisms and Soil Aggregate Stability

Influence of Agricultural Wastes and Incubation Period on Aggregate Stability in Sandy Soil

“…Also, Metzger et al, (1987) found that the amendment of loose sandy clay loam soil with sludge increased WSA > 200 micron and the number of bacteria and fungi. Similar effects were found by (Lynch and Bragg, 1985) and Tisdall Oades, 1982). The greater observed effect of both chicken and compost on WAS could be due to that such amendment contain humic substances that play a major role in the formation of WAS, in addition to the higher increase of the number of total bacteria and molds result in such treatment.…”

Long-Term Effect of Fertilization and Algalization on Aggregate Stability, Aggregate Associated Carbon and Nitrogen Under Rice-Wheat Cropping System

“…Similarly, blue green algae formed a gluing mesh and bound soil particles consequently; promoted aggregation (Belnap, 1993;Malam Issa et al, 2001). Additionally, extracellular polymeric secretions mainly composed of polysaccharides, by BGA; have also reported which acts as binding agent (Lynch and Bragg 1985).…”

Contaminants removal by bentonite amended slow sand filter

“…Bentonite particles increase the adhesion sites for bacterial biofilms leading to enhanced extracellular polymer production as evidenced by the higher OM contents of the spent BASSF specimens (3.4 to 4.2 %). It has been suggested that such films are composed of polysaccharide polymers that can bind contaminants by hydrogen and Coulombic bonding [ 4,19]. Further, the presence of micropores in bentonite would increase the hydraulic retention time of contaminants inside the BASSF specimen.…”