Mineralization and microbial biomass formation in upland soil amended with some tropical plant residues at different temperatures

Mineralization and changes in microbial biomass in water-saturated soil amended with some tropical plant residues

“…Soil used in this study was the same as that indicated in the previous study in upland soil (Azmal et al 1996). Physico-chemical characteristics of the soil were described in the previous report.…”

“…Six types of O.M., azolla (Azolla pinnata), water hyacinth (Eichhornia crassipes), dhaincha (Sesbania rostrata), cowpea (Vigna unguiculata), rice straw (Oryza sativa), and farmyard manure were selected on the basis of their C/N ratios out of 80.M. used in the previous study (Azmal et al 1996). Among the O.M., azolla, water hyacinth, dhaincha, and cowpea are tropical plant residues.…”

“…In our previous study (Azmal et al 1996) the pattern of changes in the microbial biomass and mineralization of some tropical plant residues applied in upland soil at different temperatures has been already determined. However, the pattern of changes in microbial biomass in water-saturated soil amended with tropical plant residues has not been documented.…”

Decomposition and CO2-C evolution of okara, sewage sludge, cow and poultry manure composts in soils

“…These values satisfied the criteria outlined above. Carbon / nitrogen ratios are commonly used to predict the mineralization potential of organic materials (Azmal et al 1996). In general, the higher the C / N ratio, the slower the mineralization.…”

Characteristic of Dystrustepts in the Venezuelan Andes

“…(Schmitz et al, 1989;Tavant et al, 1994;Azmal et al, 1996;Alvarez & Lavado, 1998;Hontoria et al, 1999;Wilcke et al, 2003;Blanco-Canqui et al, 2005). Separating soils on the basis of OC content is relevant because of its importance for soil quality (Seybold et al, 1997;Astier et al, 2002).…”