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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
Report 1972

Autor: Cock, James H.

Initial research on the physiology of the cassava plant will study the growth cycle of a heavy-and a medium-branched var. The effect of LAI, N and planting density will be determined as well. Other expt will study plant response to N, mineral requirements, induction of flowering, planting dates a...

Enlace original: https://cgspace.cgiar.org/handle/10568/71764

Investigación en Agricultura
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Cock, James H. ,  [Cassava physiology program review, 1972] ,  Cassava physiology program review, 1972
Report 1975

Autor: Cock, James H. Rosas SC

Cassava is a high-yielding crop, well adapted to areas of the tropics with low, uncertain rainfall and mean temperatures above 20 degrees Celsius.It has the ability to grow on very acid soils where few other crops will grow atall; however, highest yields are obtained under more fertile conditions...

Enlace original: https://cgspace.cgiar.org/handle/10568/71783

Investigación en Agricultura
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Cock, James H. ,  Rosas SC ,  [Ecophysiology of cassava] ,  Ecophysiology of cassava
Report 1984

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

Analysis of previously published data shows that an extremely close correlation (r(2) = 0.83) exists between stomatal sensitivity to changes in leaf to air vapor pressure deficit and the maximum leaf conductance at low VPD in a wide range of plant species. The hypothesis is presented that stomata...

Enlace original: https://cgspace.cgiar.org/handle/10568/71408

Investigación en Agricultura
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El-Sharkawy, Mabrouk A. ,  Cock, James H. ,  [Stomatal sensitivity to air humidity : a hypothesis for its control through peristomatal evaporation] ,  Stomatal sensitivity to air humidity : a hypothesis for its control through peristomatal evaporation
Book Chapter 1991

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

Different physiological characteristics of the cassava plant, which can be used as selection parameters, are reviewed, namely LAI, HI, biomass production, plants with amphistomatic leaves, and C4 photosynthesis. Experience indicates that it is better to select var. showing lower yield reduction u...

Se revisan diferentes caracteristicas fisiologicas de la planta de yuca que se pueden utilizar como parametros de seleccion: IAF, IC, produccion de biomasa, plantas con hojas amfistomatosas y fotosintesis C4. Se enfatiza que se debe tratar de seleccionar var. que presenten menor disminucion en co...

Enlace original: https://cgspace.cgiar.org/handle/10568/82089

Investigación en Agricultura
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Cock, James H. ,  El-Sharkawy, Mabrouk A. ,  [Caracteristicas fisiologicas para la seleccion de yuca] ,  Caracteristicas fisiologicas para la seleccion 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 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
Book 1979

Autor: Cock, James H. Domínguez O., Carlos E. Ceballos L., Luis Fernando Arregocés, Oscar

This audiotutorial unit (cassette, printed script, 76 color slides, study guide, self-evaluation test), prepared by the Communications Support Unit at CIAT, is available for use with a manually or automatically synchronized slide projector/cassette tape reccorder. Each unit is a vailabIe from the...

Esta unidad audiotutorial (cinta magnetofonica, guion, 76 transparencias a color, guia de estudio, auto-evaluacion), preparada por la Unidad de Comunicaciones del CIAT, esta disponible para usarla en sincronizacion automatica o manual por medio de un proyector de transparencias o una grabadora de...

Enlace original: https://cgspace.cgiar.org/handle/10568/77959

Investigación en Agricultura
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Cock, James H. ,  Domínguez O., Carlos E. ,  Ceballos L., Luis Fernando ,  Arregocés, Oscar ,  [Un tipo ideal de planta de yuca para rendimiento máximo [conjunto audiotutorial]] ,  Un tipo ideal de planta de yuca para rendimiento máximo [conjunto audiotutorial]

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