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Showing items 1 through 9 of 34.
  1. Library Resource
    Journal Articles & Books
    December, 1982

    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 inoculation, N and P fertilization in these soils, no response was obtained in either the Río Hato or Los Santos soils. There was a definite response to P and a slight response to inoculation in the Pacora soil, which had the poorest fertility level. N applications depressed nodulation.

  2. Library Resource
    Journal Articles & Books
    December, 1982

    Biological nitrogen (N2) fixation in both free-living and symbiotic organisms is an energy-requiring process dependent upon a supply of carbon and energy. In this paper the energy costs for N2 fixation and nodule respiration in symbiotic systems are compared with those of free-living N2-fixing systems, with the theoretical energy requierement for N2 fixation, and with the cost of utilization of combined N.

  3. Library Resource
    Journal Articles & Books
    December, 1982
    Colombia, Central America, South America

    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.

  4. Library Resource
    Journal Articles & Books
    December, 1982
    Nigeria, Zambia, Uganda, Mali, Ghana, Cameroon, Ivory Coast, Western Africa, Africa, Eastern Africa, Middle Africa, Southern Africa
  5. Library Resource
    Reports & Research
    December, 1982
    Kenya, Africa, Eastern Africa

    Describes the research approach adopted by an interdisciplinary ILCA team to study a pastoralist production system, summarizing the methodology & results of research on small ruminants' productivity in the Maasai pastoral system, and outlining dif. features of current smallstock research in Kenya; w. an analysis of flock productivity, mortality, animal nutrition & behaviour at the Elangata Wuas group ranch.

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