Revistas: Recent submissions
Now showing items 191-200 of 3334
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Pulpa y pergamino de café. X. Cambios en la composición química del pergamino de café por efecto de diferentes tratamientos alcalinos
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-04)Se llevaron a cabo dos experimentos con el fin de determinar los efectos de diferentes tratamientos alcalinos sobre la composición química del pergamino de café. En el primer experimento, se aplicaron 12 tratamientos a ... -
Reducing banana root weevil adults from an established banana plantation
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-04)Se realizó una prueba para el control mecánico del picudo negro del banano (Cosmopolites sordidus Germar) Rizomas recién desraizados y de 2-3 semanas de haberse volcado fueron puestos individualmente en cajas de cedazo ... -
Estudio de la determinación de materia orgánica en seis suelos de Costa Rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-04)Five different methods for organic carbon determination were compared, for six soils samples with variable carbon contents. The results obtained indicate that the methods tested are adequate for organic carbon recuperation, ... -
Gamma radiation effects on the reproduction of the alfalfa weevil: II. Influence of mating sequence and length of confinement on sperm transfer and utilization
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-04)Diferentes secuencias de apaareamiento de machos, irradiados o no, con hembras normales (no irradiadas) del gorgojo de la alfalfa, Hypera post.ca (Gyllenhal) demostraron la existencia de un mecanismo de precedencia de ... -
Diseño y construcción de un espectrofotómetro de campo
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-04)The quality of light is an important environmental factor in plant ecology. Several plant processes as germination, photosynthesis, morphogenesis and grouth are controlled by specific spectral bands and combination of ... -
Volumetric pricing in rural Central America: Drivers of adoption and potential effects on water delivery
(Elsevier, 2024-05-31)In rural and peri‑urban areas of Central America, community water organizations (CWOs) provide water to 60 % of the population, thereby playing a pivotal role in achieving multiple Sustainable Development Goals. However, ... -
Variation in Annual Ring and Wood Anatomy of Six Tree Mangrove Species in the Nicoya Gulf of Costa Rica
(MDPI, 2024-11-08)There is limited information regarding the adaptation of anatomical features and growth ring formation to ecological site conditions in Costa Rican mangrove trees. We used the methods and principles of ecological anatomy ... -
Using loss-on-ignition to estimate total nitrogen content of mangrove soils
(Elsevier, 2024-07-10)Loss-on-ignition (LOI) has been widely used to estimate soil organic carbon (OC) content for coastal wetland soils, owing to recent interest in ‘blue carbon’ systems. Comparatively less attention has been paid to soil ... -
El estudio de las aves neotropicales debería abarcar a las ciencias sociales
(2024-12-17)Las poblaciones de aves en el continente Americano y la región Caribe están en declive. Revertir esta tendencia y conservar a las aves de una manera efectiva es una responsabilidad que debe compartirse entre todas las ... -
The carbon footprint of livestock farms under conventional management and silvopastoral systems in Jalisco, Chiapas, and Campeche (Mexico)
(Frontiers, 2024-05-23)Livestock production is one of the most important agricultural sources of greenhouses gasses (GHG). Transforming the livestock sector is a critical task to mitigate the effects of climate change, and the implementation of ...
