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In May 1980 the soil section of CIAT's cassava program established a fertilization trial with 3 cassava var. [Barranquena (regional), M Col 113, and CMC 921 to measure its effect on yield and establish optimum levels from an economical point of view. The trial took place in Mondomito and Agua Bla...

En mayo de 1980 en la seccion de suelos del programa de yuca del CIAT se establecio un ensayo de fertilizacion con 3 var. de yuca (Barranquena (regional), M Col 113 y CMC 92) para medir su efecto en el rendimiento y establecer los niveles optimos desde el punto de vista economico. El ensayo se lo...


Díaz, R.O.Howeler, Reinhardt H.Cadavid, L.F.[Anilisis economico de un ensayo de fertilizacion en yuca]Anilisis economico de un ensayo de fertilizacion en yuca

Trees can influence both the supply and availability of nutrients in the soil. Trees increase the supply of nutrients within the rooting zone of crops through (1) input of N by biological N2 fixation, (2) retrieval of nutrients from below the rooting zone of crops and (3) reduction in nutrient lo...


Buresh, R.J.Tian, G.[Soil improvement by trees in sub-Saharan Africa]Soil improvement by trees in sub-Saharan Africa

El propósito de este trabajo es el de resumir los resultados más importantes surgidos de más de 50 años de investigación sobre la suplementación de animales en pastoreo en las regiones del Sur en el Continente Africano. Han identificado los nutrimentos limitantes principales en las praderas natur...


Niekerk, B.D.H. van[Suplementación del ganado en pastoreo]Suplementación del ganado en pastoreo

Seetharama, N.Krishna, K.R.Rego, T.J.Burford, J.R.[Planes para mejorar el sorgo respecto al uso eficiente del fósforo]Planes para mejorar el sorgo respecto al uso eficiente del fósforo

Competition for nitrogen (N) and phosphorous (P) under potato-based intercropping systems decreases the level of nutrients available for potato and subsequently influences nitrogen and phosphorous use efficiency. A field trial was conducted for four consecutive seasons between 2014 short rains an...


Gitari, H.I.Karanja, N.Gachene, C.K.K.Kamau, S.Sharma, K.Schulte-Geldermann, Elmar[Nitrogen and phosphorous uptake by potato (Solanum tuberosum L.) and their use efficiency under potato-legume intercropping systems]Nitrogen and phosphorous uptake by potato (Solanum tuberosum L.) and their use efficiency under potato-legume intercropping systems

Advances in research of the soil and plant nutrition section of CIAT's Cassava Program in 1981 are given regarding symptoms of Ca and S deficiency, germplasm screening for adaptation to high acidity and/or low P; effect of fertilization (long-term fertility); level and time of K application; effe...


International Center for Tropical Agriculture[Suelos y nutricion de la planta]Suelos y nutricion de la planta

Advances of the mycorrhiza project of CIAT's Cassava Program are highlighted. Objectives include the collection, maintenance, multiplication, and testing of mycorrhizal strains and determination of favorable cultural practices for maintaining mycorrhizal activity during the growth period of cassa...


International Center for Tropical Agriculture[Proyecto micorriza]Proyecto micorriza

Boddey, Robert M.Rao, Idupulapati M.Thomas, Richard J.[Nutrient cycling and environmental impact of Brachiaria pastures]Nutrient cycling and environmental impact of Brachiaria pastures

Gourley, Lynn Michael[Búsqueda y uso del germoplasma exótico de sorgo tolerante al aluminio]Búsqueda y uso del germoplasma exótico de sorgo tolerante al aluminio

Chemical analysis and missing element trials with Sorghum vulgare L. showed that three Panamanian soils, representative of three great soil groups, were deficient in both nitrogen (N) and phosphorus (P). When a greenhouse trial was undertaken to test the response of Cajanus cajan to rhizobial ino...


Hernández, B.C.Méndez-Lay, J.M.Focht, D.D.[Nitrogen and phosphorus requirements for the growth and nodulation of Cajanus cajan in Panamanian soils]Nitrogen and phosphorus requirements for the growth and nodulation of Cajanus cajan in Panamanian soils

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