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Productivity decline occurs in many agronomic systems due to loss of soil organic matter and a consequent decline in soil fertility. This is pronounced in light textured soils, which even in their pristine state can have low levels of fertility. High temperatures and leaching conditions in tropic...


Berthelsen, S.Noble, A.D.Ruaysoongnern, SawaengWebb, M.Hengfu, H.Jiexiang, Y.[Addition of clay based soil ameliorants to light textured soils to reduce nutrient loss and increase crop productivity]Addition of clay based soil ameliorants to light textured soils to reduce nutrient loss and increase crop productivity

In the Ecuadorian Cordillera, the hardened volcanic ashes (cangahuas) account for 15% of the cultivated area. The soil resulting from the fragmentation of these materials, generally by heavy machinery, shows an apparent stable millimetric structure. However, this new structure is highly susceptib...


Podwojewski, PascalJaneau, Jean L.[Short-term effects of agricultural practices on the soil structure and hydrodynamic in a deep tilled hardened sandy-silty volcanic–ash soil (cangahua) in Ecuador]Short-term effects of agricultural practices on the soil structure and hydrodynamic in a deep tilled hardened sandy-silty volcanic–ash soil (cangahua) in Ecuador
Friesen, Dennis K.Rao, Idupulapati M.Thomas, Richard J.Oberson, AstridSanz Scovino, José Ignacio[Phosphorus acquisition and cycling in crop and pasture systems in low fertility tropical soils]Phosphorus acquisition and cycling in crop and pasture systems in low fertility tropical soils
Janssen, M.Pohlan, J.Mulindabigwa, V.Sonwa, D.J.Deng, Z.Torrico, J.C.Callado, S.Jende, S.[Relative importance of soil organic matter, soil litter and litter fall in the tropics]Relative importance of soil organic matter, soil litter and litter fall in the tropics

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