Revistas: Envíos recientes
Mostrando ítems 151-160 de 3364
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Responses of the cotton plant to variations in the intensities of natural light
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-10-01)Two cotton genotypes (Gossypium hirsutum L.), 'MCU-S' and 'PRS-72', were subjected to variations in full sunlight hours. In both varieties, three hours of daily sunlight delayed bud initiation and reduced growth and yield, ... -
Requerimientos edáficos y climáticos para Tectona grandis L.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-01)This paper deals with climatic requirements of Tectona grandis L. for optimum growth. A survey was made of climatic and edaphic conditions of the species in its natural habitat as well as places of introduction. Using ... -
Physiological studies on groundnut plants with boron toxicity, 4: Effect on phosphorus, potassium and calcium
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-10-01)The effect of supplying 10 ppm boron to the root medium on the phosphorus, potassium and calcium status of peanut plants ("IMV-2") grown in sand was studied. In Bovo treated plants the phosphorus content of roots and middle ... -
Suelos volcánicos de Nicaragua, 2: Contenido y distribución de azufre
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-10-01)The studied soils are derived from volcanic materials and belong to the Pacific Region of Nicaragua. They have high temperatures (22–37°C) and annual rainfall fluctuations between 900 and 1,900 mm, belonging to the very ... -
Parental influence of several cacao clones on the yield performance of their progenies
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-01)El objetivo principal del mejoramiento genético en cacao es aumentar la producción. Se han publicado muchos informes de que algunos clones transmiten buenos rendimientos a sus descendencias cuando son usados como padres ... -
Algunos factores que afectan la transmisión del virus del rayado fino del maíz por Dalbulus maidis DeLong & Wolcott
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-01)Previous reports have shown that the leafhopper Dalbulus maidis transmits rayado fino virus (RFV) of maize in a manner characteristic of viruses that multiply in their insect vectors. Further studies of the virus-vector ... -
Materiales excipientes y adhesivos de posible uso en inoculación de leguminosas en Colombia
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-01)Five different peat deposits and bagazo washed to remove residual sugar were examined for their ability to maintain viable population of Rhizobium trifolii. For of the peats gave good Rhizobium survival but the remaining ... -
Effects of different salts added to a soil on bean (Phaseolus vulgaris L.) production
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-01)En el presente estudio se utilizó un suelo aluvial representativo de Guanacaste, Costa Rica (Filadelfia, serie Tempisque). Esta región ha sido clasificada como bosque seco tropical (15 m sobre el nivel del mar, temperatura ... -
Isolation of cocoa swollen shoot virus from cocoa leaves by precipitation and chromatography on Celite 545 with polyethylene glycol
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-01)Para aislar el virus del brote hinchado de hojas de cacao (Theobroma cacao) se usó un procedimiento de precipitación del virus con glicol polietileno (peso molecular 6000) y una elución gradual del virus de una columna de ... -
Notas y comentarios
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-01)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 ...
