Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 410.
  1. Library Resource
    Articles et Livres
    décembre, 1985
    Colombie, Amérique centrale, Amérique du Sud

    The factors influencing the size and shape of exptl. field plots (area of exptl. lot, soil types, trial objective, no. of replicates, and degree of accuracy and homogeneity of the exptl. material) for the execution of field expt. are discussed. The basic principles of the following different methods to determine plot size are described: max. curve method, method of Koch and Rigney, Hatheway's method, and the max. curve method using the multiple linear regression model. Some considerations are presented on the border effect and on plot size in bush and climbing bean trials.

  2. Library Resource
    Articles et Livres
    décembre, 1982
    Colombie, Amérique centrale, Amérique du Sud

    Se describen los resultados obtenidos durante 1981 por la seccion de Microbiologia del Suelo del Programa de Pastos Tropicales del CIAT, cuyos objetivos especificos son: 1) seleccionar leguminosas forrajeras promisorias que no requieren inoculacion; 2) seleccionar cepas de Rhizobium para leguminosas que si necesitan inoculacion; y 3) evaluar el efecto de las tecnicas de inoculacion y practicas de manejo de pastos en la nodulacion y fijacion de N en el campo. Se presentan los resultados de 1) expt.

  3. Library Resource
    Articles et Livres
    décembre, 1980
    Pérou, Colombie, Argentine, Mexique, Brésil, Amérique centrale, Amérique septentrionale, Amérique du Sud

    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.

  4. Library Resource
    Documents de politique et mémoires
    septembre, 2017
    Nicaragua, Amérique centrale, Amérique du Sud
  5. Library Resource
    Articles et Livres
    décembre, 2010
    Colombie, Amérique centrale, Amérique du Sud

    Soil management in the Altillanura of Colombia’s Eastern Plains The strategies used for adequate soil management for the Altillanura (high plains with flat topography) of Colombia’s Eastern Plains are reviewed to establish modern, efficient, and sustainable livestock systems in this region. Advances in technology development within the technical and scientific cooperation agreement signed between Colombia’s Ministry of Agriculture and Rural Development (MADR) and CIAT, as well as those of the Center’s Soils Project and several national institutions co-partners in the agreement.

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