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Resultados de la búsqueda

Mostrando ítems 1 a 9 de 4.
  1. Library Resource
    Artículos de revistas y libros
    Diciembre, 1980
    Perú, Colombia, Argentina, México, Brasil, América central, América Septentrional, América del Sur

    White mold, caused by the fungus Sclerotinia (Whetzelinia) sclerotiorum, is distributed worldwide and has more than 300 hosts. It infects flowers, cotyledons, seeds, leaves or injured plant tissue. The disease can be controlled by crop rotation, flooding, reduced seeding rates, application of chemical products in the middle of the flowering period, modifying plant architecture and the use of resistant var. Many soil microorganisms are associated with sclerotia and may cause them to degrade or fan to germinate. The symptoms and damage caused by the disease are illustrated in color.

  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 1980
    Perú, Colombia, Argentina, México, Brasil, América central, América Septentrional, América del Sur

    White mold, caused by the fungus Sclerotinia (Whetzelinia) sclerotiorum, is distributed worldwide and has more than 300 hosts. It infects flowers, cotyledons, seeds, leaves or injured plant tissue. The disease can be controlled by crop rotation, flooding, reduced seeding rates, application of chemical products in the middle of the flowering period, modifying plant architecture and the use of resistant var. Many soil microorganisms are associated with sclerotia and may cause them to degrade or fan to germinate. The symptoms and damage caused by the disease are illustrated in color.

  3. Library Resource
    Documentos de conferencias e informes
    Diciembre, 1980
    Perú, Colombia, Bolivia, Venezuela, Ecuador, América central, América del Sur

    Data are given of area planted to beans, production, and yields in the Andean countries during 1964-66, 1974-76, and 1978; production, trade, and consumption during 1963-65 and 1973-75; and production, area, and yield growth rates during 1966-76. Constraints for bean productivity, cropping systems, and the main bean types consumed in the Andean countries are indicated. Finally, the potential of this crop is analyzed and data of land use and population patterns in the Andean countries are included. (CIAT)

  4. Library Resource
    Artículos de revistas y libros
    Diciembre, 1980
    Bangladesh, Alemania, Perú, Indonesia, Bulgaria, Bolivia, Portugal, Myanmar, Rumania, Japón, Turquía, Uzbekistán, Italia, Brunei Darussalam, India, Bhután, Paraguay, México, Brasil, Grecia, Asia sudoriental

    Projections reveal that to sustain the likely world population in the year 2000, an increase of 60 percent in agricultural production will be required. "Is there sufficient land to meet these needs?" becomes the overriding question. However, little precise information exists on which to base a reliable answer. Previous appraisals of the global extents of arable lands, to support present and future human populations, vary from 3 to 7 thousand million hectares. Estimates of the populations these lands can support, vary from 7.5 to 40 thousand million.

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