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Journal Article 1987

Autor: Porto, M.C.M. El-Sharkawy, Mabrouk A. Cock, James H. Hernández, A. del P. Cadena, G. de

Growth and N uptake in pot-grown maize, beans, and cassava were evaluated under 2 levels of soil N at CIAT-Palmira (Colombia). The lower amount of the element reduced its uptake by the 3 species, resulting in lower tissue concn., especially in the leaves. Under low N, DM accumulation was also red...

Enlace original: https://cgspace.cgiar.org/handle/10568/88594

Investigación en Agricultura
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Porto, M.C.M. ,  El-Sharkawy, Mabrouk A. ,  Cock, James H. ,  Hernández, A. del P. ,  Cadena, G. de ,  [Crescimento, fotossintese e eficiencia do uso de nitrogenio em milho, feijao e mandioca submetidos a dois niveis de N no solo] ,  Crescimento, fotossintese e eficiencia do uso de nitrogenio em milho, feijao e mandioca submetidos a dois niveis de N no solo
Journal Article 2009

Autor: Jiménez, D. Cock, James H. Satizabal, HF Barreto Sáenz, MA Pérez Uribe, A. Jarvis, Andy Damme, Patrick van

The Andean blackberry (Rubus glaucus) is an important source of income in hillside regions of Colombia. However, growers have little reliable information on the factors that affect the development and yield of the crop, and therefore there is a dearth of information onhowto effectively manage the...

Enlace original: https://cgspace.cgiar.org/handle/10568/43181

Investigación en Agricultura
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Jiménez, D. ,  Cock, James H. ,  Satizabal, HF ,  Barreto Sáenz, MA ,  Pérez Uribe, A. ,  Jarvis, Andy ,  Damme, Patrick van ,  [Analysis of Andean blackberry (Rubus glaucus) production models obtained by means of artificial neural networks exploiting information collected by small-scale growers in Colombia and publicly available meteorological data] ,  Analysis of Andean blackberry (Rubus glaucus) production models obtained by means of artificial neural networks exploiting information collected by small-scale growers in Colombia and publicly available meteorological data
Journal Article 1979

Autor: Cock, James H. Franklin, D. Sandoval, G. Juri, P.

A series of trials were carried out using cassava. Crop growth rate increased with leaf area up to LAI 4; root growth rate increased up to LAI 3-3.5, then declined. LAI is determined by leaf size, leaf formation rate and individual leaf life. Leaf size reached a max 4 mo after planting and then d...

Enlace original: https://cgspace.cgiar.org/handle/10568/88470

Investigación en Agricultura
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Cock, James H. ,  Franklin, D. ,  Sandoval, G. ,  Juri, P. ,  [The ideal cassava plant for maximum yield] ,  The ideal cassava plant for maximum yield
Journal Article 1990

Autor: El-Sharkawy, Mabrouk A. Cock, James H.

In recent studies of cassava at CIAT, net CO2 uptake rates of 20 to 35 ?mol CO2 m?2 s?1 were commonly observed. Cassava photosynthesis has a high optimum temperature (35°C) and a wide plateau (25 to 35°C) corresponding to the temperature range under which cassava is cultivated. Leaf photosynthesi...

Enlace original: https://cgspace.cgiar.org/handle/10568/43951

Investigación en Agricultura
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El-Sharkawy, Mabrouk A. ,  Cock, James H. ,  [Photosynthesis of cassava (Manihot esculenta)] ,  Photosynthesis of cassava (Manihot esculenta)
Journal Article 1987

Autor: El-Sharkawy, Mabrouk A. Cock, James H.

Cassava (Manihot esculenta Crantz) is a staple food for a large sector of human population in the tropics. It is widely produced for its starchy roots by small farmers over a range of environments on poor infertile soils with virtually no inputs. It is highly productive under favorable conditions...

Enlace original: https://cgspace.cgiar.org/handle/10568/44051

Investigación en Agricultura
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El-Sharkawy, Mabrouk A. ,  Cock, James H. ,  [Response of cassava to water stress] ,  Response of cassava to water stress
Journal Article 1981

Autor: Cock, James H.

Based on research results, the advantages of cassava over other crops, the use of improved cv. for different ecosystems, good management practices, crop protection, and soil fertility requirements are discussed in detail. (CIAT)

Enlace original: https://cgspace.cgiar.org/handle/10568/88493

Investigación en Agricultura
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Cock, James H. ,  [Some factors in successful cropping. 9. Cassava] ,  Some factors in successful cropping. 9. Cassava
Journal Article 2015

Autor: Howland, Fanny Cecile Muñoz, Luis Armando Staiger-Rivas, Simone Cock, James H. Álvarez, S.
Enlace original: https://cgspace.cgiar.org/handle/10568/69528

Investigación en Agricultura
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Howland, Fanny Cecile ,  Muñoz, Luis Armando ,  Staiger-Rivas, Simone ,  Cock, James H. ,  Álvarez, S. ,  [Data sharing and use of ICTs in agriculture: working with small farmer groups in Colombia] ,  Data sharing and use of ICTs in agriculture: working with small farmer groups in Colombia
Journal Article 2011

Autor: Cock, James H. Oberthür, Thomas Isaacs, C. Läderach, Peter Palma, A Carbonell Gonzalez, JA Victoria, J. Watts, G Amaya, A. Collet, L Lema, G Anderson, E

For millennia farmers have continually improved their crop management and production practices through their observations and experience. More recently modern science and research methods based on controlled experiments became the most visible instrument of technological change in agriculture, ne...

Enlace original: https://cgspace.cgiar.org/handle/10568/43308

Investigación en Agricultura
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Cock, James H. ,  Oberthür, Thomas ,  Isaacs, C. ,  Läderach, Peter ,  Palma, A ,  Carbonell Gonzalez, JA ,  Victoria, J. ,  Watts, G ,  Amaya, A. ,  Collet, L ,  Lema, G ,  Anderson, E ,  [Crop management based on field observations: case studies in sugarcane and coffee] ,  Crop management based on field observations: case studies in sugarcane and coffee
Journal Article 2011-03

Autor: Jiménez, D. Cock, James H. Jarvis, Andy García, J. Satizábal HF Damme, Patrick van Pérez Uribe, A. Barreto Sáenz, MA

Every time a farmer plants and harvests a crop represents a unique event or experiment. Our premise is that if it were possible to characterize the production system in terms of management and the environmental conditions, and if information on the harvested product were collected from a large nu...

Enlace original: https://cgspace.cgiar.org/handle/10568/41954

Investigación en Agricultura
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Jiménez, D. ,  Cock, James H. ,  Jarvis, Andy ,  García, J. ,  Satizábal HF ,  Damme, Patrick van ,  Pérez Uribe, A. ,  Barreto Sáenz, MA ,  [Interpretation of commercial production information: a case study of lulo (Solanum quitoense), an under-researched Andean fruit] ,  Interpretation of commercial production information: a case study of lulo (Solanum quitoense), an under-researched Andean fruit
Journal Article 1987

Autor: Riano, N.M. Cock, James H. López F., Y. El-Sharkawy, Mabrouk A.

To determine the presence of Kranz anatomy, chloroplast structure and distribution in cassava leaf tissues, a selection was made among materials of CIAT`s germplasm bank. Two materials were selected, var. MCol 22 and hybrid CM 507-37; work was also carried out with maize var. Swan Laposta C48B (m...

Enlace original: https://cgspace.cgiar.org/handle/10568/88589

Investigación en Agricultura
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Riano, N.M. ,  Cock, James H. ,  López F., Y. ,  El-Sharkawy, Mabrouk A. ,  [Anatomia Kranz, estructura y distribucion de cloroplastos en hojas de yuca (Manihot esculenta Crantz)] ,  Anatomia Kranz, estructura y distribucion de cloroplastos en hojas de yuca (Manihot esculenta Crantz)

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