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Now showing items 31-36 of 36
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 ...
Influencia del manejo de dos suelos del trópico húmedo sobre sus propiedades químicas
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1982-04)
An Inceptisol and an Ultisol were studied in the greenhouse after previous exposure to high or low intensity of cultivation.
The Ultisol is more responsive to similar management practices than the Inceptisol, as it becomes ...
Aluminio activo en suelos derivados de cenizas volcánicas de Costa Rica y Guatemala
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
Active aluminum extracted with 0.2 M ammonium oxalate, pH 30, and 4 M KOH of 51 samples of Andepts of Costa Rica and Guatemala was quantified and compared. Acid-oxalate extractable alumimum varied from 0.02 to 5.45 while ...
Relaciones fósforo-zinc en tres suelos ácidos de Costa Rica, 1: comportamiento en el suelo.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
The effects of high P and Zn applications and their interactions were studied in three acid (pH 5 .3-5.9 ) soils of Costa Rica. It was observed that as all three soils fixed P strongly, the obtained available P levels, ...