Turrialba
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Differential response of cotton to cycocel plant growth regulant
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)Se encontró que el cicocel aumentaba el rendimiento de las variedades de algodón cuando la estructura de la planta era altamente arbustiva, extendida y con predominancia de crecimiento vegetativo. El aumento en rendimiento ... -
New techique for colchicine treatment of coffee seedlings
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)No presente trabalho sao relatadas observacoes preliminares sobre a eficiencia do uso de agulhas de vidrio na duplicacao de cromossomos pela colquicina. "Seedlings" de café receberam doses variaveis do alcaloide em solucoes ... -
Influencia del potasio en la resistencia de los tejidos de arroz al ataque de Pyricularia oryzae Cav.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)The relation between 5 levels of potassium (1170, 1750, 2340 2920, y 3510 ppm), foliage tissue resistance and rice panicle resistance to the action of Pyricularia oryzae Cav. was studied. Plants height and dry residue was ... -
Radiosensibilidad del grano de polen de tomate cultivado en soluciones nutritivas
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)Pollen grain culture in an appropriate nutritive media is of importance because it gives the possibility to produce haploid plants, that will show better the presence and frequence of mutants. This work tries to prove the ... -
A bean, corn and manioc polyculture cropping system. I. The effect of interspecific competition on crop yield
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)Frijoles (Phaseolus vulgaris), maíz (Zea mays) y yuca (Manihot esculenta) se plantaron separadamente en tres sistemas de monocultivo, y juntos en tres sistemas de policultivo, en Turrialba, Costa Rica. En un sistema de ... -
Investigación sobre sistemas de producción agrícola para el pequeño agricultor del trópico
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)An experiment was carried out at Turrialba, Costa Rica, to test different systems of production suited for small farmers, characterized by an excess of hand labor and a shortage of land and money. The study included various ... -
Physiological studies on groundnut plants with boron toxicity. III. Effect on chlorophyll, iron and copper metabolism
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)En cultivos en avena, con 10 ppm de boro suministrado al medio radical de plantas de maní (cv ´TMV-2´, tipo compacto) fueron afectadas las clorofilas, hierro, actividades de enzimas hierro-porfirinas, cobre, y enzimas ... -
Rasgos que identifican a algunos Vertisoles de la Zona Central de Chile
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)Physical, physico-chemical, mineralogical, macro-and micromorphological characterisitics of clay soils from the Central Zone of Chile were studied. It was concluded that the incipient degree of soil evolution is characterized ... -
Fertilidad de algunos Andepts dedicados a potreros en Costa rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)Grassland soils of the Cordillera Volcánica Central of Costa Rica were seperated in two groups, sampled and tested for soil reaction, exchangeable cations, extractable phosphorous, organic carbon and texture. The first ... -
Contenido de proteína, lisina y potasio en grano de trigo en función de época de siembra y cultivar
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)Four cultivars of spring wheat (Triticum aestivum L.) were grown at four dates of planting in Valivia, Chile, to study the effects on total protein content, lysine and potassium of wheat grain. The results indicated that ...
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