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Now showing items 441-450 of 450
Uso de la isoterma de adsorción para evaluar requerimientos de fósforo, 2: Determinación con base en los datos de adsorción, del requerimiento externo de fósforo para Vigna unguiculata L. var. Tuy [suelos, Venezuela].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
The external phosphorus requirement for Vigna unguiculata L. var. Tuy (Frijol bayo) was determined in pot and field experiments The chosen soils were corrected for macro and micro-nutrients deficiences using the corresponding ...
Avances de la investigación realizada en el Perú sobre los efectos de la salinidad en la producción de la caña de azúcar [Saccharum officinarum, suelos].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
In the present work principal results obtained in 5 years of field research with sugarcane cultivated on saline and saline-sodic soils are reported.
All the experiments were carried out with cultivar H32-8560 under field ...
Efectos del desecamiento del suelo sobre el metabolismo de nitrógeno en tres cultivares de maíz (Zea mays L.).
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
The effects of water stress on the nitrogen metabolism of three corn (lea mays L ) cultivars (Piranao, Centrahnex, IPEACS III) were studied.
Measurements were made of the Relative Water Content (RWC); nitrate-reductase ...
Descripción de instares y observaciones sobre la biología del gusano verde del repollo, Pieris aripa Boisduval [Brassica oleracea].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
The importance of crucifers and their pests is given, with emphasis on the lepidopterous pests found in Venezuela Ascia monuste L , Plutella xilostella L and Pieris aripa Boisduval. Descriptions of the different stages ...
Contribución al estudio del fósforo en suelos ácidos. 1: Características de adsorción y fracciones de fósforo en una tierra parda del noroeste de España.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
P adsorption isotherm and P fractions were used to study the P adsorption characteristics of an acid brown soil from Galicia (North West of Spain). Adsorption data were adjusted to Freundlich, Langmuir, and Gunary equations, ...
Regulación química de la floración y fructificación en ajonjolí (Sesamum indicum L.).
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
The object of this research was to increase the harvested seed in sesame (Sesamum indicum L.). Microscopical observations showed that seeds mature far before the capsules open so it is possible to fasten plant maturity ...
Características químicas de las semillas de tarhui (Lupinus mutabilis) cosechadas en Cuzco, Perú.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
Tarhui (Lupinus rnutabilis) is a legume native to the Highlands (2 500 — 4 500 m above sea level) of Peru, with appreciable resistance to frost, drought and poor soils. Results obtained in this work confirms that tarhui ...
Una metodología para la estimación-simulación de áreas de captación de lluvia in situ que optimicen en el aprovechamiento de las precipitaciones en agricultura de secano.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-10)
Methods and procedures are described for the estimation-simulation of rain water harvest areas in situ (rain harvest-runt on lands) to maximize yield considering climates variability. Emphasis is given to the introduction ...
Estudio de la longevidad del polen de maíz (Zea mays L.) en el proceso de selección.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-10)
Comparing the values of half life of pollen, estimating the viability by the ability of pollen to font the pollentube under experimental conditions that allows to obtain up to 93 per cent viability, it was found that the ...
Relación entre el rendimiento y la forma de la panoja en la quinua
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-10)
Quinua's panicle shape, which could be glomerulated or amarantiform, does not relate to yield neither to other yield components such as earliness, height of plant, panicle length and grain diameter.