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Trials of four species of Eucalyptus in the Huánuco Region of Perú
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-04-01)Compendium. Four species of Eucalyptus, E. globulus, E. camaldulensis, E. rostrata, and E. robusta were planted in the Huánuco Valley, Peru. At the end of four years, there was no significant difference (P0.05) in DBH or height. -
Notas silviculturales sobre el Alnus jorullensis Caldas, Colombia
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-01)In certain regions of the Central Cordillera of Colombia, especially East of Manizales, Capital of the Departamento de Caldas, between altitudes of 2000 and 3250 meters above sea level, the native alder (Alnus jorullensis ... -
The effect of burning or germination of seeds at different soil depths of various tropical tree species.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-01)Tentando verificar o efeito da queimada sobre a germinação de sementes, os autores observaram 1550 sementes de várias essências tropicais, após exposição ao calor da queimada a diferentes profundidades no solo. Cerca de ... -
Maderas latinoamericanas IV. Bursera simaruba, Poulsenia armata, Pterocarpus officinalis y Ficus werckleana
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-01)Anatomical characteristics of four Central-american timber species. Bursera simaruba (L) Sarg, Poulsenia armata (Minq.), Pterocarpus officinalis Jacq. y Ficus werckleana Rossberg, are described. Furthermore the physical, ... -
Procesamiento de semilla de algodón para producir aceite y proteína
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-01)Industrial level cooking and screwpressing experiments cottonseed are described. The conditions of cooking, drying and pressing were determined in order to obtain a cake of high protein quality without affecting substantially ... -
Studies on the shootborer Hypsipyla grandella (Zeller) (Lepidoptera Pyralidae). V. Observations on a rearing technique and on host selection behavior of adults in captivity
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-04-01)A technique for the laboratory rearing of Hypsipyla grandella Zeller and a method for the mass production of the insect's eggs are described. Based on the data observed with two types of diets, one synthetic and one natural, ... -
Destete precoz de becerras bajo condiciones desfavorables: El uso de varios niveles de heno de alfalfa
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-01)Three groups involving 22 females Holstein calves were used to compare different systems of alfalfa hay feeding. Following abrupt weaning at 28 days of age, one group received ad libitum amounts of a basal ration having ... -
The effect of copper on the growth and major nutrient contents of coffee seedlings grown in nutrient solutions
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-01)Se estudiaron los efectos de diferentes concentraciones de cobre (CuSO4) en soluciones nutritivas (0, 10, 100, 250, 500 y 750 ppm Cu) sobre el contenido de los nutrimentos mayores de plántulas de Coffea arabica cv "S.L.34". ... -
Mineralización de P-orgánico en suelos ácidos
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-01)Mineralization of organic phosphorus was studied in three volcanic soils of Costa Rica. The results indicated that for Juray (Alluvial) and Birrisito (vitrandept) mineralization was observed measured by an increase in ... -
Efecto del encalado en las formas y disponibilidad de fosfatos en suelos de la región cacaotera, Bahía, Brasil
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-01)Muestras compuestas (0-20 cm) de ocho suelos ácidos de la región cacaotera del sur de Bahía, Brasil, fueron encalados con óxidos de Ca y Mg. Las necesidades de encalado fueron determinadas de acuerdo a Abruña y Chandler y ...
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