• Evaluación de la fertilidad de un suelo mediante la producción de materia seca en ensayos de macetas. IV. Determinación de la fórmula de fertilización mediante Trifolium subterraneum y Lolium perenne x Lolium multiflorum 

  Schenkel S, G.; Floody A, T. (Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-10)

  The nutritional deficiencies of a granitic soil, Santa Sofia, is determined by the use of Lolium perenne x Lolium multiflorum and Trifolium subterraneum in potted tests. Eight levels of lime and five fertilizer treatments ...
• Algunas propiedades físicas de dos suelos derivados de cenizas volcánicas, de Pasto, Colombia, determinadas por diferentes métodos 

  Arias H, A.; Guerrero Riascos, R. (Instituto Interamericano de Cooperación para la Agricultura (IICA), 1971-10)

  The present study was carried out with two soils profiles from volcanic ashes, both located in the Municipality of Pasto, Nariño, Colombia. One shows more undeveloped morphological features (Prophile 1). The following ...
• Trials of four species of Eucalyptus in the Huánuco Region of Perú 

  Somberg, Seymour I. (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 

  Sicco Smit, Gerardus (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. 

  Brinkmann, W. L. F.; Vieira, A. N. (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 

  Van Der Slooten, H. J.; Gonzalez, Marta E. (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 

  Mayorga, Hector; González, Jaime; Arzu, Alberto; Rolz, Carlos (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 

  Grijpma, P. (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 

  Butterworth, M.H.; Renteria, J.J. (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 

  Adote Aduayi, E. (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". ...

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