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Cambios en fracciones orgánicas e inorgánicas de fósforo en suelos con el uso de sistemas agroforestales
(CATIE, Turrialba (Costa Rica), 1994)
Se cultivaron maíz (Zea mays L.) y frijol (Phaseolus vulgaris L.), secuencialmente por nueve años en sistemas agroforestales distintos, asociándolos con yuca (Manihot esculenta Crantz), durante los tres primeros años, en ...
The effect various methods of land preparation on soil resistence to penetration and yield of corn (Zea mays L.), cassava (Manihot esculenta Crantz) ans sweet potato (Ipomoea batatas L.) in association. II. Effect on yield
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1985-10)
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 ...
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 ...
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, ...
Determinación del nivel de inóculo primario de Pseudomonas solanacearum en suelos con infestación natural
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1982-10)
Several methods were tested for detecting the residual inocuhnn of Pseudomonas solanacearum, Race 1, in inceptisols at Turrialba, Costa Rica, where lire bacterium is apparently endemic Planting healthy potato tubers in ...
The effect of various of methods of land preparation on soil resistence to penetration and yields of corn (Zea mays L.) cassava (Manihot esculenta Crantz) and sweet potato (Ipomoea batatas L.) in association. I. Effect of croping systems and land preparation on the soil
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1985-10)
La resistencia del suelo a la penetración se midió cuando un suelo Typic Dystropept fue arado durante la estación seca (abril 1975) y la estación húmeda (junio), utilizando un tractor de oruga Caterpillar D4 de 60 kW (75 ...
Dispersal limitation, soil, and fire affect functional properties of tropical secondary forests on abandoned cattle ranching landscapes
(2021)
Forest age is a major predictor of secondary forest functional properties and through the chronosequence approach continues to be a principal focus in local, landscape, and regional-scale studies of secondary succession. ...
Do Coffee Agroforestry Systems Always Improve Soil Carbon Stocks Deeper in the Soil?—A Case Study from Turrialba, Costa Rica
(2020)
Shaded perennial agroforestry systems (AFS) are regarded as desirable land-use practices that improve soil carbon sequestration. However, most studies assume a positive correlation between above ground and below ground ...
Evaluación de los requerimientos hídricos en el Pacífico Norte de Costa Rica
(1986-01)
En este estudio se establece los requerimientos hídricos necesarios para el desarrollo de la agricultura en el Pacífico Norte de Costa Rica. Se utiliza dos modelos agroclimáticos (balance hídrico e irrigación), que simulan ...