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Efecto del período de amamantamiento con calostro sobre el comportamiento de terneros de lechería
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-01)
Colostmm feeding is an important practice in any calf feeding program due to its role in imparting protection against infections through the immunoglobulths it contains. The present study was designed in order to evaluate ...
Ciclos biogeoquímicos en un ecosistema forestal de los Andes Occidentales de Venezuela, 3: Ciclo hidrológico y translocación de elementos químicos con el agua [suelos].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-04)
The annual hydrological budget in the montane forest ecosystem of San Eusebio, Mdrida, Venezuela, was studied and water samples collected and analysed for chemical composition. Total rainfall was 1 576 mm, canopy rainfall ...
Germinación de dos especies de Tiliaceas arbóreas de la vegetación secundaria tropical: Belotia campbellii y Heliocarpus donell-smithii [México].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-01)
Seeds were collected from two species of fast growing tropical pioneer trees from Mexico. The seeds were subjected to different conditions of temperature, light and storage Beloria campbellii showed strong initial endogenous ...
Ciclos biogeoquímicos en un ecosistema forestal de los Andes Occidentales de Venezuela, 4: Modelos y conclusiones [suelos].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-04)
Following a basic model for biogeochemical cycling, the stores and transfers of N, P, K, Na, Ca, Mg, Mn, Fe and Al in the montane forest ecosystem of San Eusebio, Merida, Venezuela, are presented. The input layer of the ...
Variabilidad genética y ambiental en inhibidores de tripsina y hemaglutininas, observadas en cultivares de frijol común (Phaseolus vulgaris) proveniente de América Central y Colombia.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-04)
The purpose of the present study was to learn of the effects of environment and of color of seed coat on the concentration of trypsin inhibitors and hemagglutinin compounds in Phaseolus vulgaris. A total of 20 cultivars ...
Uso de la isoterma de adsorción para evaluar requerimientos de fósforo, 1: Isotermas de adsorción de los suelos [Venezuela].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
The principal aim of this research work is to determine the phosphorus fertilizer requirements in some Venezuelan soils. The chosen soils were contrasting in both chemical and textural characteristics. The method consisted ...
Ciclos bioquímicos en un ecosistema forestal de los Andes Occidentales de Venezuela, 1: Inventario de las reservas orgánicas y minerales (nitrógeno, fósforo, potasio, calcio, magnesio, manganeso, hierro, aluminio, nitrato).
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-01)
In 13 stands of a montane forest ecoystem in the Sierra de Merida, northwestern Venezuela, the organic matter and stored elements (N, P, K, Ca, Mg, Fe, Mn, Al and Na) were measured.
The soils of the studied area are very ...
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.