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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 2005

Autor: Calle, F Pérez Velásquez, Juan Carlos Gaitan, W Morante, N Ceballos, H. Llano Rodríguez, Germán Alberto Álvarez, E.

There is a limited knowledge on the inheritance of traits with agronomic relevance in cassava. A diallel study among 10 parental clones was conducted in the acid-soils environment in the eastern savannas of Colombia. Thirty clones were obtained for each F1 cross. Each clone was represented by six...

Enlace original: https://cgspace.cgiar.org/handle/10568/42737

Investigación en Agricultura
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Calle, F ,  Pérez Velásquez, Juan Carlos ,  Gaitan, W ,  Morante, N ,  Ceballos, H. ,  Llano Rodríguez, Germán Alberto ,  Álvarez, E. ,  [Diallel inheritance of relevant traints in cassava (Manihot esculenta Crantz) adapted to acid-soil savannas] ,  Diallel inheritance of relevant traints in cassava (Manihot esculenta Crantz) adapted to acid-soil savannas
Journal Article 2006

Autor: Jiménez Jaén, J.J. Rossi, JP

Although there has been a growing interest in the study of soil fauna spatial distribution during the past decade, the identification of the environmental driving factors behind the population patterning are difficult to highlight. Soil physico-chemical heterogeneity is partly responsible for str...

Enlace original: https://cgspace.cgiar.org/handle/10568/44125

Investigación en Agricultura
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Jiménez Jaén, J.J. ,  Rossi, JP ,  [Spatial dissociation between two endogeic earthworms in the Colombian "Llanos"] ,  Spatial dissociation between two endogeic earthworms in the Colombian "Llanos"
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 2002

Autor: Decaëns, Thibaud Jiménez Jaén, J.J.

This study was carried out in the Eastern Plains of Colombia and assessed the impact of agricultural intensification on the structure of earthworm communities. Earthworms were hand-sorted in a variety of agroecosystems of increasing intensity, from natural savanna to pastures and annual crops. An...

Enlace original: https://cgspace.cgiar.org/handle/10568/42762

Investigación en Agricultura
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Decaëns, Thibaud ,  Jiménez Jaén, J.J. ,  [Earthworm communities under an agricultural intensification gradient in Colombia] ,  Earthworm communities under an agricultural intensification gradient in Colombia
Journal Article 2003

Autor: Wenzl, Peter Mancilla, LI Mayer, Jorge Edgard Albert, R. Rao, Idupulapati M.

Aluminum toxicity limits plant growth in acid soils. Because of their advanced state of weathering, acid soils of the tropics also tend to be deficient in nutrients. A realistic assessment of plant adaptation to these soils would therefore require Al-toxic conditions under which growth is simulta...

Enlace original: https://cgspace.cgiar.org/handle/10568/44098

Investigación en Agricultura
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Wenzl, Peter ,  Mancilla, LI ,  Mayer, Jorge Edgard ,  Albert, R. ,  Rao, Idupulapati M. ,  [Simulating infertile acid soils with nutrient solutions: The effects on Brachiaria species] ,  Simulating infertile acid soils with nutrient solutions: The effects on Brachiaria species
Journal Article 2006

Autor: Hausller, K Rao, Idupulapati M. Schultze-Kraft, Rainer Marschner, H

Phosphorus (P) deficiency and aluminium (Al) toxicity are widespread in Oxisols of the tropical savannas of eastern Colombia. A field experiment was conducted to determine the effect of Al toxicity and P deficiency on plant growth and nutrient uptake of two Brachiaria species. To examine the infl...

Enlace original: https://cgspace.cgiar.org/handle/10568/44093

Investigación en Agricultura
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Hausller, K ,  Rao, Idupulapati M. ,  Schultze-Kraft, Rainer ,  Marschner, H ,  [Shoot and root growth of two tropical grasses, Brachiaria ruziziensis and B. dictyoneura, as influenced by aluminium toxicity and phosphorus deficiency in a sandy loam oxisol of the eastern plains of Colombia] ,  Shoot and root growth of two tropical grasses, Brachiaria ruziziensis and B. dictyoneura, as influenced by aluminium toxicity and phosphorus deficiency in a sandy loam oxisol of the eastern plains of Colombia
Journal Article 2005

Autor: Vanlauwe, Bernard Aihou, K. Tossah, B.K. Diels, J. Sanginga, Nteranya Merckx, R.

The functioning of trees as a safety-net for capturing nutrients leached beyond the reach of crop roots was evaluated by investigating changes in exchangeable cations (Ca, Mg, and K) and pH in a wide range of medium to long term alley cropping trials in the derived savanna of West Africa, compare...

Enlace original: https://cgspace.cgiar.org/handle/10568/44087

Investigación en Agricultura
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Vanlauwe, Bernard ,  Aihou, K. ,  Tossah, B.K. ,  Diels, J. ,  Sanginga, Nteranya ,  Merckx, R. ,  [Senna siamea trees recycle Ca from a Ca-rich subsoil and increase the topsoil pH in agroforestry systems in the West African derived savanna zone] ,  Senna siamea trees recycle Ca from a Ca-rich subsoil and increase the topsoil pH in agroforestry systems in the West African derived savanna zone
Journal Article 2006

Autor: Ogutu, J. Bhola, N. Piepho, Hans-Peter Reid, Robin S.

Effective management and conservation of wildlife populations require reliable estimates of population size, which can be difficult and costly to obtain. We evaluated how precision in estimates of herd size and abundance varies with sample size and strip width using two field surveys and bootstra...

Enlace original: https://cgspace.cgiar.org/handle/10568/33026

Investigación en Agricultura
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Ogutu, J. ,  Bhola, N. ,  Piepho, Hans-Peter ,  Reid, Robin S. ,  [Efficiency of strip- and line-transect surveys of African savanna mammals] ,  Efficiency of strip- and line-transect surveys of African savanna mammals
Journal Article 1999

Autor: Sackey, Anthony K.B. Sanni, Bamidele D. Abdullahi, Shehu U. Fadason, T.S.

A total of 35 herds of cattle from 2 inistitutional farms, and 6 privately-owned farms which were semi-intensively managed, and 17 nomadic Fulani herds were studied between January 1984 and December 1993 to evaluate the age of first calving (AFC) in the three major indigenous breeds of the Savann...

Enlace original: https://cgspace.cgiar.org/handle/10568/66655

Investigación en Agricultura
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Sackey, Anthony K.B. ,  Sanni, Bamidele D. ,  Abdullahi, Shehu U. ,  Fadason, T.S. ,  [Observation on the Age at First Calving in the Savannah Breeds of Cattle in Northern Nigeria] ,  Observation on the Age at First Calving in the Savannah Breeds of Cattle in Northern Nigeria

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