Browsing Turrialba by Issue Date
Now showing items 1-20 of 2372
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Some observations on permanent mixed cropping in the humid tropics
(CATIE, Turrialba (Costa Rica), 1961)Después de discutir parte de la literatura existente sobre cultivos mixtos en los trópicos, los autores describen un experimento establecido en 1950 cerca de Turrialba (Costa Rica), en el que Hevea (hule o caucho) sola, ... -
Ciencia Agrícola en las Américas
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1961-01-01)En esta sección se publican notas de interés técnico sobre conferencias internacionales programas de investigación, extensión y educación, nombramiento de personal directivo, organización de nuevas instituciones, distinciones ... -
Problems associated with cutting and weighing techniques for measuring tropical herbage productivities
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1961-01-01)Se discute el problema de utilizar en los tropicos datos y técnicas desarrollados en las zonas templadas para medir la productividad de los forrajes. Se da atención detallada a los posibles errores en la medición del forraje ... -
Métodos para inducir la brotación de los tubérculos de papa para semilla
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1961-01-01)In Bolivia, potato planting is done twice a year, the spring planting being the most important. This planting is made from October through November in non-irrigated lands in the highlands and bigh valleys, and the second ... -
Un aparato micro Kjeldahl simple para análisis rutinarios rápidos de materias vegetales
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1961-01-01)Many descriptions of the semi-or micro- Kjeldahl method have already been published but most of them require elaborate and expensive equipment that is subject to breakage and is difficult to repain In this paper, a simple ... -
Some observations on permanent mixed cropping in the humid tropics
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1961-01-01)Observaciones acerca de las diferencias en producción entre una plantación de caacho y otra de cultivo asociado de cacao y cancho sugieren que la razón de la supe viovidd del cultivo mixto (basada en los ingresos netos), ... -
Sobre o poder germinativo de sementes do algodao mocó, Gossypium hirsutum Marie-Galante Hutch., tratadas pelo ácido sulfúrico
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)The germinative power of Macó cotton seeds (Gossypium hirsutum mariegalante Hutch) desinfected with concentrated sulphuric acid (density 184) during 50 minutes of exposition, was determined sowing the seeds at 1, 15, 30 ... -
Un hongo semejante a Ceratocystis moniliforme en cacao en Costa Rica
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)In the course of laboratory work with diseased plants of cacao, a fungus was isolated, that differs from Ceratocystis fimbriata and C. paradoxa. Its morphological characteristics indicate that the isolate is similar to C. ... -
La fermentación de pequeñas muestras en investigaciones sobre el procesado del cacao
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)Rohan trays were sub-divided by plywood walls into ten compartments in order to cure cacao samples as small as 3000 grams, when all compartments were filled with cacao beans. The position of the samples within the tray did ... -
Acao de detergentes sobre o crescimento de "seedlings" de milho (Zea mays L.)
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)The action of several detergents upon the growth of seedlings of hybrid corn (Zea mays L.) was determined Of seven "Carbowax type detergents, used at the concentration 02 per cent, only Carbowax-200 was phytotoxic regarding ... -
An African commentary on economic development
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)Contrastase la actitud de los teóricas occidentales sobre desarrollo económico, representados por W. W. Rostow, con la de intelectuales africanas, represen tados por DK Chisiza, de Nyasaland. La contribución de Chisiza es ... -
Fluctuaciones del contenido de amino ácidos libres en dactylis, durante el ritmo endógeno anual de germinación
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)The free amino acid content of caryopses of Dactylis glomerata were studied as a function of the endogenous rhythm of germination. A great variation in the monthly content of the total free amino acids was found, but there ... -
Reseñas de libros: Turrialba (IICA), vol. 12(1)
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)Reseñas de distintos libros, escritas por distintos autores. Cada reseña explica de qué trata la obra, cómo está estructurada, qué temas aborda y aporta una crítica, en la que los autores especifican en qué puede mejorar ... -
Eficacia del aldrin, dieldrin y heptachlor en el combate del picudo del tubérculo de la papa, Premnotrypes vorax (Huctache) (coleóptera: Curculionidae) en Ecuador
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)A test was conducted at Chimborazo province, Ecuador, on control of the Irish potato weevil, Premnotrypes vorax (Huct.), one of the principal insect pest of this crop The insecticides tested were Aldvin, Dieldrin and ... -
Búsqueda de fuentes de resistencia de ají al hongo Phytophtora citrophthora
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)Wilt disease is the main limiting factor of the red pepper (Capsicum) crop in Peru The author determined the causal agent to be Phytophthora citrophthora and not Fusarium annuum, as was thought before. A search for somces ... -
Observaciones sobre fertilidad comparada y efecto de la inseminación artificial sobre la Trichomoniasis en vacunos lecheros
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)Comparisons are made on fertility of dairy cattle before and after the introduction in 1957 of artificial insemination Fertility was good in Criollo cattle under natural conditions, until there was a drop due to the presence ... -
El uso de isótopos radioactivos y de radiaciones en la agricultura tropical
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)A brief discussion of the problems and promises of using radiations and radioisotopes in the developing tropical countries is presented. Specific progress reports in this field have been given for India, where most of the ... -
Pruebas de toros en el mejoramiento del ganado criollo lechero tropical
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)Progeny tests were made with four Criollo bulls, based on milk and butterfat praduction in the first calving of their daughters Results show that the indexes are similar to those obtained from the best bull of a previous ... -
La utilización de sangre de razas europeas y zebú para producción de leche en América Tropical
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)Comparisons have been made for ten year performance of Jersey cows and two generations of halfbred Jersey x Zebu, and Brown Swiss x Zebu, at Turrialba. Results up to now indicate that for animals fed on tropical grasses ... -
El problema del crecimiento estacional del bovino en clima tropical
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)Even in the humid tropics such as Turial. D ba, where grasses are green throughout the year, marked seasonallity in weight increase in young cattle was observed This is ascribed to seasonal changes in the feeding value of ...
