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Mostrando ítems 1 a 9 de 16.
  1. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979

    Emphasis has been placed on the screening of hybrid selections for resistance to rust, anthracnose, BCMV and Empoasca sp., yield and sensitivity to photoperiod. A total of 1464 materials (937 selections from the breeding program) were screened in the Bean Team Nursery and 700 (200 breeding selections) in the Preliminary Yield Trial. Results from the latter demonstrated major gains in yield among colored materials and a very high proportion of lines resistant to BCMV. Many lines demonstrated multiple-disease resistance.

  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979
    Colombia, América central, América del Sur

    Multiple cropping, sequential cropping, intercropping, mixed intercropping, intercropping in rows, in strips, relayed intercropping, cropping patterns, monoculture, crop rotation and land equivalent ratio are defined. The characteristics of multiple cropping and intercropping with beans are discussed; for the latter problems of competence are discussed (light, CO2, water and nutrients). Some cultural practices are recommended for cassava/bean intercropping: soil and fertilization type, water availability, propagation material, and weed, pest and disease control.

  3. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979
    Colombia, América central, América del Sur

    Some cultural control measures of weeds in cassava are discussed: quality of the material, planting system and density, density x plant type interaction and use of mulching. In order to study the interaction plant type x planting density, var. M Mex 59 (vigorous) and M Col 22 (nonvigorous) were planted in plots of 7500 and 15,000 plants/ha; and 3 levels of weed control were established: complete, intermediate and no control. The vigorous var.

  4. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979
    Colombia, América del Sur, América central

    This audiotutorial unit (cassette, printed script, 76 color slides, study guide, self-evaluation test), prepared by the Communications Support Unit at CIAT, is available for use with a manually or automatically synchronized slide projector/cassette tape reccorder. Each unit is a vailabIe from the Distribution Office at a cost of US$ 50; photocopies of the study guide alone can be obtained from the Cassava Information Center. The objective of this unit is to present some of the results of research conducted by the physiology Section of CIATs Cassava Program.

  5. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979
    Botswana, África, África austral

    Survey on the economy of Botswana, w. emphasis on mining production, gross domestic product, prices, cereal production, and livestock and meat export.

  6. Library Resource
    Informes e investigaciones
    Diciembre, 1979
    Colombia, América central, América del Sur
  7. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979
    Colombia, América del Sur, América central

    This audiotutorial unit (cassette, printed script, 140 color slides, study guide, self-evaluation test), prepared by the Communication Support Unit at CIAT, is available for use with a manually or automatically synchronized slide projector/cassette tape recorder. Each unit is available from the Distribution Office at a cost of US$50; photocopies of the study guide alone can be obtained from the Bean Information Center.

  8. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979

    La cuantificacion analitica de suelos y tejidos vegetales es un instrumento efectivo para interpretar la existencia de deficiencias o excesos de minerales. El uso adecuado de esta informacion influye significativamente en las recomendaciones de fertilizantes. Sin embargo, debe admitirse que existe conflicto en las fases de cuantificacion, interpretacion y recomendacion debido a la alta variabilidad existente en estas fases.

  9. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979
    África, África occidental

    Description of geographical aspects of the Subhumid Zone of West Africa and economic and sociological aspects of the Fulani ethnic group, w. emphasis on fodder resources, range management, livestock raising, livestock management, and animal diseases, w. analysis of land use & land development strategies, and directions for future research.

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