Browsing by Subject "Suelo"
Now showing items 1-13 of 13
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Adsorcao de nitrato em Latossolos sob vegetacao de cerrado
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-10-01)Adsorption of nitrate by nine oxisols collected in cerrados (savannah) from Brazil was measured in solutions containing graded amounts of KNO, Nitvate adsorp-tion for B-horizons varied from 0.11 mmol/100 g for soil suspensions ... -
Algunas notas sobre el problema del encalado en los suelos del trópico
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1968-07)The effect of liming on soil pH, ion exchange capacity, nutrient availability and toxicity, soil structure and microbial activity and crop yield has been a rather controversial aspect in tropical soil science. There are, ... -
Categorías de fósforo en los principales grandes grupos de suelos en la Amazonía de Brasil
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1968-07)In 46 soil samples taken from different depths from 12 profiles representative of the seven main Great Soil Groups of the Brazilian Amazon region, their organic, total, Ca-Al-Fe and water soluble phosphates were determined. ... -
Comparacao de extratores químicos de fósforo en solos do sul da Bahia
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1972-01-01)The available phosphorus in 10 soils samples taken from the Southern region of Bahia was measured by the sulfomolibdic colorimetric method using Mehlich (North Carolina), Egner-Riehm, Truog and modified Olsen and Olsen as ... -
Conductividad capilar de un suelo derivado de cenizas volcánicas
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-10-01)Resumen. Se presenta la conductividad capilar de un suelo de ceniza volcánica chilena en función del potencial mátrico y el contenido volumétrico de agua. Se encontró un movimiento lento del agua a pesar de la alta retención ... -
Espacamento em feijao-de-corda (Vigna siensis Endl.) no Ceará
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1970-10-01)An experiment was conducted to study the effect of bill spacing on the yield of cow pea (Vigna sinensis Endl.) at Capistrano, Ceará (Brazil) in 1968. Five hill spacing (0.25, 0.50, 075, 1.00 and 1.50 m) in sows 100 m ... -
Formas de micronutrientes em solos da regiao cacaueira da Bahia
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1972-01-01)The distribution of different forms of Zn, Cu, Mn, Fe and Mo was investigated in eight typical soil profiles from the cocoa region of Bahia, Brazil. In general, the distribution of the total contents of trace elements in ... -
Performance of cowpeas cv 'Black-eye' in Guyana as afected by phosphorus and potassium
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-04-01)The effect of P (0, 15, and 30 kg/ha) and K (0, 27.5, and 55 kg/ha) on yield, its components, and nodulation of the canpi, Vigna unguiculata (L) Walp. cr 'Blackeye', was studied in a soil species present in two vegetation ... -
Relación entre el crecimiento de plantaciones de Cupressus lusitanica y las propiedades de los suelos derivados de cenizas volcánicas en Colombia
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-04-01)En la Cordillera Central de Colombia, Departamento de Antioquia, el crecimiento de las plantaciones de Cupressus lusitanica (Miller) en suelos de ceniza volcánica es extremadamente variable y está estrechamente relacionado ... -
Reseña de libros
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1973-04-01)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 ... -
Reseña de libros: Turrialba (IICA), vol. 22(1)
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1972-01-01)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 ... -
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 ... -
The effect of slash and burn agriculture on plant nutrientes in the Tertiary Region of Central Amazonia
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1973-07-01)This work was carried out in an experimental area of cacan near kvi 30 of the Manaus-Itacoatiava highway. The modifications in the chemical composition of the superficial layer of solo (up to 20 cm deep), in amamelos ...
