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Journal Article 2002

Autor: Cobo Borrero, Juan G. Barrios, E. Kass, DCL Thomas, Richard J.

Leaves of nine green manure (GM) species were surface applied to a tropical volcanic-ash soil at a rate of 100 kg N ha 1 in order to evaluate their N-fertilizer value in a glasshouse experiment. GM treatments were compared to urea at two rates, 50 kg N ha 1 (FN50) and 100 kg N ha 1 (FN100), and t...

Enlace original: https://cgspace.cgiar.org/handle/10568/43893

Investigación en Agricultura
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Cobo Borrero, Juan G. ,  Barrios, E. ,  Kass, DCL ,  Thomas, Richard J. ,  [Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil] ,  Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil
Journal Article 2014

Autor: Qadir, Manzoor Quillérou, E. Nangia, V. Murtaza, G. Singh, M. Thomas, Richard J. Drechsel, Pay Noble, A.D.

Food security concerns and the scarcity of new productive land have put productivity enhancement of degraded lands back on the political agenda. In such a context, salt-affected lands are a valuable resource that cannot be neglected nor easily abandoned even with their lower crop yields, especial...

Enlace original: https://cgspace.cgiar.org/handle/10568/75867

Investigación en Agricultura
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Qadir, Manzoor ,  Quillérou, E. ,  Nangia, V. ,  Murtaza, G. ,  Singh, M. ,  Thomas, Richard J. ,  Drechsel, Pay ,  Noble, A.D. ,  [Economics of salt induced land degradation and restoration, natural resources forum] ,  Economics of salt induced land degradation and restoration, natural resources forum
Journal Article 1999

Autor: Decaëns, Thibaud Rangel Becerra, AF Asakawa, N. Thomas, Richard J.

The effects of a large species of anecic earthworm, Martiodrilus carimaguensis Jiménez and Moreno, on soil C and N dynamics were investigated in a native savanna and a man-made pasture of the eastern plains of Colombia. We compared, across time (11 months), the total C, total N, NH+ 4 and NO– 3 c...

Enlace original: https://cgspace.cgiar.org/handle/10568/43243

Investigación en Agricultura
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Decaëns, Thibaud ,  Rangel Becerra, AF ,  Asakawa, N. ,  Thomas, Richard J. ,  [Carbon and nitrogen dynamics in ageing earthworm casts in grasslands of the eastern plains of Colombia] ,  Carbon and nitrogen dynamics in ageing earthworm casts in grasslands of the eastern plains of Colombia
Journal Article 2002

Autor: Cobo Borrero, Juan G. Barrios, E. Kass, DCL Thomas, Richard J.

The decomposition and nutrient release of 12 plant materials were assessed in a 20-week litterbag field study in hillsides from Cauca, Colombia. Leaves of Tithonia diversifolia (TTH) and Indigofera constricta (IND) decomposed quickly (k=0.035±0.002 d?1), while those of Cratylia argentea (CRA) and...

Enlace original: https://cgspace.cgiar.org/handle/10568/42717

Investigación en Agricultura
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Cobo Borrero, Juan G. ,  Barrios, E. ,  Kass, DCL ,  Thomas, Richard J. ,  [Decomposition and nutrient release by green manures in a tropical hillside agroecosystem] ,  Decomposition and nutrient release by green manures in a tropical hillside agroecosystem
Journal Article 2005

Autor: Barrios, Edmundo Cobo Borrero, Juan G. Rao, Idupulapati M. Thomas, Richard J. Amézquita Collazos, Edgar Jiménez Jaén, Juan José Rondón, Marco Antonio
Enlace original: https://cgspace.cgiar.org/handle/10568/77688

Investigación en Agricultura
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Barrios, Edmundo ,  Cobo Borrero, Juan G. ,  Rao, Idupulapati M. ,  Thomas, Richard J. ,  Amézquita Collazos, Edgar ,  Jiménez Jaén, Juan José ,  Rondón, Marco Antonio ,  [Fallow management for soil fertility recovery in tropical Andean agroecosystems in Colombia] ,  Fallow management for soil fertility recovery in tropical Andean agroecosystems in Colombia
Journal Article 1994

Autor: Fisher, Myles J. Rao, Idupulapati M. Ayarza, Miguel Angel Lascano, Carlos E. Sanz Scovino, José Ignacio Thomas, Richard J. Vera, Raúl R.
Enlace original: https://cgspace.cgiar.org/handle/10568/77749

Investigación en Agricultura
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Fisher, Myles J. ,  Rao, Idupulapati M. ,  Ayarza, Miguel Angel ,  Lascano, Carlos E. ,  Sanz Scovino, José Ignacio ,  Thomas, Richard J. ,  Vera, Raúl R. ,  [Carbon storage by introduced deep-rooted grasses in the South American savannas] ,  Carbon storage by introduced deep-rooted grasses in the South American savannas
Journal Article 1998

Autor: Jiménez Jaén, J.J. Moreno, Alonso Decaëns, Thibaud Lavelle, Patrick M. Fisher, Myles J. Thomas, Richard J.

The structure and seasonal changes of earthworm communities were evaluated in a natural savanna and in a improved grass-legume pasture in a Colombian oxisol over a period of 18 months. One plot of 90×90 m was isolated in each of the systems and each month five samples of 1 m2×0.5 m and ten of 20×...

Enlace original: https://cgspace.cgiar.org/handle/10568/42761

Investigación en Agricultura
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Jiménez Jaén, J.J. ,  Moreno, Alonso ,  Decaëns, Thibaud ,  Lavelle, Patrick M. ,  Fisher, Myles J. ,  Thomas, Richard J. ,  [Earthworm communities in native savannas and man-made pastures of the Eastern Plains of Colombia] ,  Earthworm communities in native savannas and man-made pastures of the Eastern Plains of Colombia
Journal Article 2011

Autor: Jiménez, J.J. Decaëns, Thibaud Amézquita Collazos, Edgar Rao, Idupulapati M. Thomas, Richard J. Lavelle, Patrick M.

In this study, we investigated the spatial distribution of an earthworm community together with the heterogeneity of selected soil properties in a gallery forest (GF) of the Colombian Llanos . We performed fine-scale spatial variability by intensively sampling 100 points distributed in the nodes...

Enlace original: https://cgspace.cgiar.org/handle/10568/44094

Investigación en Agricultura
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Jiménez, J.J. ,  Decaëns, Thibaud ,  Amézquita Collazos, Edgar ,  Rao, Idupulapati M. ,  Thomas, Richard J. ,  Lavelle, Patrick M. ,  [Short range spatial variability of soil physico-chemical variables related to earthworm clustering in a Neotropical gallery forest] ,  Short range spatial variability of soil physico-chemical variables related to earthworm clustering in a Neotropical gallery forest
Journal Article 1995-08

Autor: Fisher, Myles J. Rao, Idupulapati M. Lascano, Carlos E. Thomas, Richard J. Vera, Raúl R. Ayarza, Miguel Angel
Enlace original: https://cgspace.cgiar.org/handle/10568/77756

Investigación en Agricultura
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Fisher, Myles J. ,  Rao, Idupulapati M. ,  Lascano, Carlos E. ,  Thomas, Richard J. ,  Vera, Raúl R. ,  Ayarza, Miguel Angel ,  [Pasture soils as carbon sink] ,  Pasture soils as carbon sink
Journal Article 1994

Autor: Rao, Idupulapati M. Ayarza, Miguel Angel Thomas, Richard J.

Soil carbon distribution with depth, stable carbon isotope ratios in soil organic matter and their changes as a consequence of the presence of legume were studied in three 12-year-old tropical pastures (grass alone Brachiaria decumbens (C4), legume alone Pueraria phaseoloides (C3) and grass + l...

Enlace original: https://cgspace.cgiar.org/handle/10568/44183

Investigación en Agricultura
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Rao, Idupulapati M. ,  Ayarza, Miguel Angel ,  Thomas, Richard J. ,  [The use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pastures] ,  The use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pastures

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