Browsing Revistas by Issue Date
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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, ... -
Digestibilidad del pasto Imperial Axonopus scoparius y Gamalote Paspalum fasciculatum
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)The digestibilities of Imperial Grass (Axonopus scoparius) and Gamalote (Paspalum fasciculatum) cut at eight weeks of age are reported. Imperial grass with 15.25% dry matter contained 55.43% TDN and 2181 Kcal of digestible ... -
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 ... -
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 ... -
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 ... -
Leguminosas en los pastizales de Costa Rica
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)A list is given of the numerous species found in grasslands in Costa Rica. They constitute from 5 to 25 percent of the forage produced in some of the better pastures Attention is called to the probable use fulness of the ... -
Ciencia Agrícola en las Américas
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-01-01)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 ... -
A reversal of cacao seed sensitivity to cold
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1963-01)Semilla de cacao, sometida a un tratamiento frío de 4 grados centígrados por 10 minutos fue tratada subsecuentemente a 25 grados centígrados, 37 grados centígrados, 45 grados centígrados y 60 grados centígrados por 10 ... -
Valor de hormonas estrogénicas y progesterona en ceba de novillos
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1963-01)Data are presented on two experiments carried out at Turrialba, Costa Rica, on the effect of hormone implants on the rate of pasture fattening in steers. The main grass species available was molasses grass (Melinis ...
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