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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

Esta metodología no destructiva proporciona un medio de seguimiento del desarrollo del cultivo de la yuca bajo una gama de ambientes biofísicos, sin la necesidad de sembrar ensayos específicamente para este propósito. Las parcelas establecidas o lotes comerciales se pueden monitorizar de form...


Cock, James H.Moreno Cadena, Leidy PatriciaToro, M.A.Arango, Jacobo[Sistema de monitoreo no destructivo en yuca]Sistema de monitoreo no destructivo en yuca

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

Álvarez Villada, D.M.Estrada Iza, MCock, James H.[RASTA Rapid Soil and Terrain Assessment: Guía práctica para la caracterización del suelo y del terreno]RASTA Rapid Soil and Terrain Assessment: Guía práctica para la caracterización del suelo y del terreno

Jones, Peter G.Díaz, WilliamCock, James H.[Homologue: A computer system for identifying similar environments through the tropical world, versión Beta a.0 [CD-ROM]]Homologue: A computer system for identifying similar environments through the tropical world, versión Beta a.0 [CD-ROM]

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...


Jiménez, D.Cock, James H.Satizabal, HFBarreto Sáenz, MAPérez Uribe, A.Jarvis, AndyDamme, 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

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

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