Soils Agricultural chemistry Economics Food security Soil Science Soil conservation Soil conservation-tropics-congresses Soil management Soil science soil erosion-tropics-congresses Biomass energy Carbon contents Carbon cycle (Biogeochemistry) Carbon sequestration Communities Ecological consequences of biofuel Financial Economics Grazing management Household Sector Humid tropics Monitoring and assesment Natural and anthropogenic distrubance Office Automation--Office management Organic Farming Enhances Soil Carbon and its Benefits Rainfall Scientific spirit Soi degradation Soil Carbon Management Economics Environmental and Societal Benefits Soil Erosion;carbon storage; Soil alterations in perennial pasture