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]
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Crescimento, fotossintese e eficiencia do uso de nitrogenio em milho, feijao e mandioca submetidos a dois niveis de N no solo
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, 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]
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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
El-Sharkawy, Mabrouk A.
,
Cock, James H.
,
[The humidity factor in stomatal control and its effect on crop productivity]
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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...
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 ...
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. ...
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 ...
Cock, James H.
,
Lynam, John K.
,
[Potencial futuro e investigacion necesaria para el incremento de la yuca]
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Potencial futuro e investigacion necesaria para el incremento de la yuca
Two methods of rapid propagation of promissory cassava genetic material are described in detail: by shoots on 2-node stem sections and by single leaf-bud cuttings. (CIAT)
Se describen en detalle 2 metodos de multiplicacion acelerada de material genetico promisorio de yuca: el de retonos de estacas de 2 nudos y el de esquejes de una hoja y yema. (CIAT)
Toro, Julio C.
,
Roca, W.
,
Cock, James H.
,
[Metodos de multiplicacion acelerada de material genetico promisorio de yuca Manihot esculenta Crantz]
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Metodos de multiplicacion acelerada de material genetico promisorio de yuca Manihot esculenta Crantz
Multiple cropping, sequential cropping, intercropping, mixed intercropping, intercropping in rows, in strips, relayed intercropping, cropping patterns, monoculture, crop rotation and land equivalent ratio are defined. The characteristics of multiple cropping and intercropping with beans are discu...
Se definen: cultivo multiple, en secuencia, intercalado, intercalado mixto, intercalado en surcos, intercalado en bandas o fajas, intercalado de relevo, patron de cultivo, monocultivo, rotacion de cultivos y relacion equivalente de terreno. Se describen en detalle las caracteristicas de los culti...
Thung, M.
,
Cock, James H.
,
[La yuca como cultivo principal de un sistema de cultivo multiple]
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La yuca como cultivo principal de un sistema de cultivo multiple
A system for rapid propagation of cassava is described, including detailed characteristics of the installations (propagation chambers and rooting area), materials needed and process to be followed. The advantages of this system are: (1) it is the only way of rapidly propagating promissory var. in...
Se describe un sistema de propagacion rapida de la yuca, incluyendo caracteristicas detalladas de las instalaciones (camara de propagacion y area de enraizamiento), materiales requeridos y procedimiento que se debe seguir. Las ventajas de este sistema son: 1) es la unica manera de propagar var. p...