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Journal Article 1987

Crescimento, fotossintese e eficiencia do uso de nitrogenio em milho, feijao e mandioca submetidos a dois niveis de N no solo

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

MANIHOT ESCULENTA

SOIL FERTILITY

NUTRIENT UPTAKE

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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

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

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

MULBERRIES

RUBUS

HILLSIDES

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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

The ideal cassava plant for maximum yield

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

MANIHOT ESCULENTA

BRANCHING

GROWTH

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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

Photosynthesis of cassava (Manihot esculenta)

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

MANIHOT ESCULENTA

PHOTOSYNTHESIS

AIR TEMPERATURE

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El-Sharkawy, Mabrouk A. , Cock, James H. , [Photosynthesis of cassava (Manihot esculenta)] , Photosynthesis of cassava (Manihot esculenta)

Journal Article 1987

Response of cassava to water stress

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

MANIHOT ESCULENTA

CULTIVARS

WATER STRESS

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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

Some factors in successful cropping. 9. Cassava

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

MANIHOT ESCULENTA

BIOLOGICAL CONTROL

CLIMATIC REQUIREMENTS

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Cock, James H. , [Some factors in successful cropping. 9. Cassava] , Some factors in successful cropping. 9. Cassava

Journal Article 2015

Data sharing and use of ICTs in agriculture: working with small farmer groups in Colombia

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

KNOWLEDGE MANAGEMENT

INFORMATION AND COMMUNICATION TECHNOLOGIES (ICTS)

FARMERS

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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

Crop management based on field observations: case studies in sugarcane and coffee

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

CROP MANAGEMENT

MANEJO DEL CULTIVO

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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

Interpretation of commercial production information: a case study of lulo (Solanum quitoense), an under-researched Andean fruit

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

AGRICULTURE

CLIMATE

SOLANUM QUITOENSE

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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

Anatomia Kranz, estructura y distribucion de cloroplastos en hojas de yuca (Manihot esculenta Crantz)

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

MANIHOT ESCULENTA

LEAVES

CHLOROPLASTS

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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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Resultados de búsqueda

[RF_Andy_Jarvis_James Cock_2009.pdf]