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Mostrando ítems 91-100 de 177
Distribución de la vegetación en las ruinas mayas y su relación con el uso de la tierra en la antiguedad en Lamanai, Belice
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-01)
A quantitative analysis of forest vegetation at the ancient Maya settlement of Lamanai (ca 300BC - AD 1640) was undertaken to determine the relationship between extant vegetation and the major and minor ruins. Five ...
Nutrición mineral y actividad de nitrato reductasa en cafetos afectados por deficiencias minerales
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-01)
Nitrate reduction potential was investigated in the coffee tree in relation to mineral deficiency Nitrogen, phosphorus, potassium, calcium, magnesium and sulphur deficiencies were studied on the grounds of their individual ...
Efecto del estacado sobre el rendimiento y calidad de frijoles trepadores
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-01)
Indeterminate beans (Phaseolus vulgaris L.) were grown on 9l cm ridges in three seasons to compare the effects of no staking, vertical and horizontal staking on the seed yield and seed quality of beans. The seed yields, ...
Actividad sinergística de esteres de fósforo sobre insecticidas de anticolinesterasa en el picudo del algodón Antonomus grandis Boheman
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-01)
Papel del fósforo y del cobre sobre el crecimiento y composición del café Arábica cultivado en arena
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-04)
Non-flowering two-year old Coffea arabica L. (cv.'S.L 34') plants were grown in sand culture and treated with varying combinations of copper and phosphorus. Increases in the number of leaves and flower buds were observed ...
Agua del suelo y aereación en la producción de frijol rojo. 1 Succión máxima media de humedad del suelo
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-01)
Grain and aerial dry matter production and the number of pods per plant were found to be maximum in the '27-R' cultivar of Phaseolus vulgaris L, a red bean grown in the tropics, when the maximum soil moisture suction was ...
Efectos de los macronutrimentos en el crecimiento y acumulación de materia seca en marañón (Anacardium occidentale L.)
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-04)
In a sand culture experiment the effects of varying concentrations of N, P, K, Ca, Mg and S on the growth of cashew were investigated. Both deficiencies and excesses of the nutrients depressed the rate of growth and dry ...
Compatibilidad de la yuca con cuatro especies silvestres de Manihot de Brasil Central
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-01)
Hybridizations between cassava (Yuca), Manibol esculenta Crantz, and the wild species, M anomala Pohl, M. oligantha Pax subsp nesteli, M. gracilis Pax, and M. zehutneri Ule were fertile. Meiosis of the four species was ...
Cambios inducidos por el etileno en la composición química del mucílago de café
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-04)
Exogenous application of ethylene (360 ppm) to the developiag fruits of Robusta coffee brought about significant compositional changes in the mesocarp. The trends obtained with proteins, carbohydrates, pectins and polyphenols ...
Crecimiento temprano y fotosíntesis en tomate (Lycopersicum esculentum)en condiciones nutritivas deficientes
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1978-04)