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Now showing items 31-40 of 46
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 ...
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 ...
Características tecnológicas y nutricionales de 20 cultivares de frijol común (Phaseolus vulgaris), 1: Características físicas del grano [valor nutritivo].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-01)
The objective of this work was to estimate the possible effect of variety on the physical, organoleptic and culinary characteristics of 20 bean varieties (10 black, 4 red, 3 beige and 3 white) and, taking yield into ...
Observaciones sobre la distribución espacial de Meloidogyne incognita después de la cosecha en dos plantíos de tabaco burley [Nicotiana tabacum].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-01)
Two burley tobacco (Nicotiana tabacum L.) fields (A and B) were sampled inmediately after harvest at Repunta, Perez Makin county, Costa Rica, to perform observations on the spatial distribution of Meloidogyne incognita ...
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, 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 ...
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 ...
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 bioquímicos en un ecosistema forestal de los Andes Occidentales de Venezuela, 2: Producción y descomposición de los residuos vegetales.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-01)
Litter production (tree stands, each 12 collectors; sampling every two weeks) and litter decomposition (samples of leaves and branches exposed to enviroment, collection every two months) were studied in a montane forest ...
Determinación de los períodos global y crítico de competencia de las malezas con arroz (Oryza sativa L. Inti) de transplante.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-01)
This research work was developed at Lambayeque, Peril. The main aims were to determine weed population, to study their effects on the yield components and to determine the global and critical competition period during ...