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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
Book Chapter 1979

Autor: Cock, James H. Lynam, John K.

The possibilities of underdeveloped countries to satisfy their needs for food and to improve the standard of Eving through cassava production are analyzed. The following aspects are studied: potential cassava production (current and potential situation), general research policies and areas (var. ...

Se analizan las posibilidades de los paises subdesarrollados para satisfacer sus necesidades de alimentacion y mejorar el nivel de vida con base en la produccion de yuca. Se contemplan los siguientes aspectos: produccion potencial de la yuca (situacion actual y potencial), politica general de la ...

Enlace original: https://cgspace.cgiar.org/handle/10568/81701

Investigación en Agricultura
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Cock, James H. ,  Lynam, John K. ,  [Potencial futuro e investigacion necesaria para el incremento de la yuca] ,  Potencial futuro e investigacion necesaria para el incremento de la yuca
Book Chapter 1983

Autor: Cock, James H.

Adequate resources and infrastructure for the exchange of cassava germplasm are discussed according to the type of material received (sexual seed, cuttings, and meristems). The final objective of exchanging cassava germplasm among different countries is to obtain improved var.; in order to do so,...

Se analizan los recursos y la infraestructura adecuados para el intercambio de germoplasma de yuca segun el tipo de material que se reciba (semilla sexual, estacas y meristemas). El objetivo final del intercambio de yuca entre diferentes paises es obtener var. mejoradas; para lograrlo se requiere...

Enlace original: https://cgspace.cgiar.org/handle/10568/81752

Investigación en Agricultura
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Cock, James H. ,  [Infraestructura necesaria para el intercambio de germoplasma de yuca] ,  Infraestructura necesaria para el intercambio de germoplasma de yuca
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

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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

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