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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...


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

The criteria for technology design are as follows: suitable for areas presently marginal for agricultural production; low inputs; give a nonperishable product for transportation; simple to transfer and easy to manage, requiring minimal changes in the traditional systein, Some problems that are be...


Cock, James H.[Criteria for design of a new technology]Criteria for design of a new technology

Cock, James H.Domínguez O., Carlos E.Gómez G., Guillermo G.Leihner, D.E.Lynam, John K.Pachico, Douglas H.Toro, Julio C.[La yuca en el Ecuador: recomendaciones para el desarrollo y ejecución de un proyecto de producción, secamiento y comercialización]La yuca en el Ecuador: recomendaciones para el desarrollo y ejecución de un proyecto de producción, secamiento y comercialización

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...


Cock, James H.[Cassava physiology program review, 1972]Cassava physiology program review, 1972

El-Sharkawy, Mabrouk A.Cock, James H.[The humidity factor in stomatal control and its effect on crop productivity]The humidity factor in stomatal control and its effect on crop productivity

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...


Cock, James H.Rosas SC[Ecophysiology of cassava]Ecophysiology of cassava

Cock, James H.Wholey, D.W.Lozano, J.C.Toro, Julio C.[Sistema rápido de propagación de yuca]Sistema rápido de propagación de yuca

Se llevó a cabo una serie de ensayos con yuca (Manihot esculenta Crantz). La tasa de crecimiento del cultivo aumentó proporcionalmente con el índice de área foliar (IAF) hasta un IAF de 4, y la tasa de crecimiento de la raíz aumentó basta un IAF de 3 -3,5 y luego disminuyó. El IAF se determina de...


Cock, James H.Franklin, DLSandoval, GJuri, P.[La planta ideal de yuca para obtener rendimientos máximos]La planta ideal de yuca para obtener rendimientos máximos

A trend exists for using natural dried cassava as an animal feed. However, the technology of cassava drying is not well developed. The rate at which cassava dries when placed in the open air depends on the drying system, the relative humidity, the air temperature and the wind velocity. Particles ...


Roa, GCock, James H.[Natural drying of cassava]Natural drying of cassava

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