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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...

During 1981 genotype evaluation and selection continued at the ICA (Instituto Colombiano Agropecuario)-Caribia and the ICA-CIAT- Carimagua stations and at CIAT-Palmira, considered representative sites, resp., of (1) low-input technology with medium to high fertility soils in hot, lowland tropics ...

Durante 1981 se continuo la evaluacion y seleccion de genotipos en ICA (Instituto Colombiano Agropecuario)-Caribia, ICA-CIAT- Carimagua y CIAT--Palmira que son sitios representativos, resp., de tecnologias de 1) bajos insumos en suelos de fertilidad intermedia- alta en el tropico calido de tierra...

During 1981 the analysis of the potential adoption and impact of improved cassava production technology was continued at various levels and included: farm-level studies of the profitability of improved technology and constraints to adoption; analysis of costs of processing and marketing; and rese...

Durante 1981 se continuo el analisis de la adopcion potencial y el impacto de la tecnologia mejorada en la produccion de yuca en varios niveles se incluyo: estudios sobre la rentabilidad de tecnologia mejorada en fincas y limitaciones para la adopcion; analisis de costos de procesamiento y mercad...

During 1981 the introduction of germplasm was continued with an additional 147 clones from Brazil in the form of aseptic meristem cultures. Cassava germplasm bank evaluation for adaptation, resistance to diseases and pests, yield, and root quality is in progress in the north coast of Colombia (Me...

Durante 1981 se continuo la introduccion de germoplasma, especialmente 147 clones de Brasil en la forma de cultivo de meristemos. Se siguio la evaluacion del banco de germoplasma de yuca por su adaptacion, resistencia a enfermedades y plagas rendimiento y calidad de las raices en la Costa Norte d...

Losses in root and planting material production caused by different pests as well as their biological control are evaluated. Studies of pests damaging dried cassava in storage were initiated. Biological aspects and form of attack of the following pests are described: stemborers (Lagochirus rogers...

Two expt. were carried out at CIAT-Palmira to assess maize//yam//cassava intercropping; species were planted alone or in double and triple combinations for a total of 11 treatments. Planting distances of 1.2 x 1.0 m, with furrows spaced at 1 m, were used for all 3 crops in monoculture as well as ...

En CIAT-Palmira se sembraron 2 expt. para evaluar el sistema de cultivo asociado maiz//name//yuca, en los que se sembraron las especies solas o en combinaciones dobles y triples para un total de 11 tratamientos. Se utilizaron distancias de siembra de 1.2 x 1.0 m en caballones espaciados a 1 m par...

The practice of treating cassava seed with chemicals was assessed on cassava growing farms in the departments of Cordoba, Sucre, Bolivar, and Atlantico (Colombia). On each farm the seed of cassava var. Venezolana was divided into 2 big lots: one of the lots was immersed in a solution of benomyl (...

En fincas de productores de yuca en los departamentos de Cordoba, Sucre, Bolivar y Atlantico (Colombia), se evaluo la practica de tratar la semilla de yuca con productos quimicos. En cada finca, la semilla de yuca var. Venezolana se dividio en 2 grandes lotes: uno de los lotes se sumergio en una ...

A multisite trial (6 sites) was carried out to determine the optimum plant populations for one of the most important cropping systems used in the Lorica district (Cordoba, Colombia): maize associated with yam and intercropped with cassava. Plant populations of 1.2 x 1.0, 1.2 x 1.3, and 1.2 x 1.6 ...

Se realizo un ensayo multilocalizado (6 sitios) para determinar la densidad de poblacion optima del arreglo maiz asociado con name e intercalado con yuca, uno de los mas importantes en el Distrito de Lorica (Cordoba, Colombia). Se utilizaron densidades de poblacion de 1.2 x 1.0, 1.2 x 1.3 y 1.2 x...