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Fonte, Steven J.Nesper, MaikeHegglin, DjangoVelásquez, Jaime E.Ramírez, BerthaRao, Idupulapati M.Bernasconi, Stefano M.Bünemann, Else K.Frossard, EmmanuelOberson, Astrid[Pasture degradation impacts soil phosphorus storage via changes to aggregate-associated soil organic matter in highly weathered tropical soils]Pasture degradation impacts soil phosphorus storage via changes to aggregate-associated soil organic matter in highly weathered tropical soils

Planted tree or shrub fallows can help increase the fertility of degraded tropical soils. We investigated the effects of planted fallows of Indigofera (IND), Calliandra (CAL), and Tithonia (TTH); a natural, unmanaged fallow (NAT); and a maize/bean rotation (ROT) on the dynamics and partitioning o...


Phiri, SBarrios, E.Rao, Idupulapati M.Singh, B.R.[Changes in soil organic matter and phosphorus fractions under planted fallows and a crop rotation system on a Colombian volcanic-ash soil]Changes in soil organic matter and phosphorus fractions under planted fallows and a crop rotation system on a Colombian volcanic-ash soil
Basamba, T.A.Barrios, E.Amézquita Collazos, EdgarRao, Idupulapati M.Singh, B.R.[Efecto de sistemas de labranza en el rendimiento de maíz en un oxisol de la sabana colombiana: fraccionamiento de materia orgánica y fósforo del suelo]Efecto de sistemas de labranza en el rendimiento de maíz en un oxisol de la sabana colombiana: fraccionamiento de materia orgánica y fósforo del suelo
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
Singh, Bal RamRao, Idupulapati M.Barrios, EdmundoAmézquita Collazos, Edgar[Potential of tillage, agropastoral, and planted fallow systems in low-fertility tropical soils in Latin America]Potential of tillage, agropastoral, and planted fallow systems in low-fertility tropical soils in Latin America

Soil organic matter (SOM) and phosphorus (P) fractions play a key role in sustaining the productivity of acid-savanna oxisols and are greatly influenced by tillage practices. In 1993, a long-term experiment on sustainable crop rotation and ley farming systems was initiated on a Colombian acid-sav...


Basamba, T.A.Barrios, E.Amézquita Collazos, EdgarRao, Idupulapati M.Singh, B.R.[Tillage effects on maize yield in a Colombian savanna oxisol : Soil organic matter and P fractions]Tillage effects on maize yield in a Colombian savanna oxisol : Soil organic matter and P fractions

It is widely believed that tropical soils (mainly Oxisols) have excellent physical characteristics such as high infiltration rates, high permeability of water, good and stable soil structure and that consequently, they can support mechanized agriculture. However in the Eastern Plains (Llanos Orie...


Amézquita Collazos, EdgarThomas, Richard J.Rao, Idupulapati M.Molina Lopez, DLHoyos Garcés, Phanor[Use of deep-rooted tropical pastures to build-up an arable layer throught improvement soil properties of an oxisol in the Eastern Plains (Llanos Orientales) of Colombia]Use of deep-rooted tropical pastures to build-up an arable layer throught improvement soil properties of an oxisol in the Eastern Plains (Llanos Orientales) of Colombia

Belowground (BG) plant resource allocation, including roots and rhizodeposition, is a major source of soil organic matter. Knowledge on the amounts and turnover of BG carbon (C), nitrogen (N), and phosphorus (P) in soil is critical to the understanding of how these elements cycle in soil-plant sy...


Stevenel, PierreFrossard, EmmanuelAbiven, S.Rao, Idupulapati M.Tamburini, F.Oberson, A.[Using a Tri-Isotope (13C, 15N, 33P) Labelling Method to Quantify Rhizodeposition]Using a Tri-Isotope (13C, 15N, 33P) Labelling Method to Quantify Rhizodeposition

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