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.
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Showing items 1 through 9 of 14.-
Library ResourceJournal Articles & BooksDecember, 1982
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Library ResourceJournal Articles & BooksDecember, 1982
This paper reviews the experimental basis for the lectin-recognition hypothesis and considers ways in which the host/Rhizobium interaction might be manipulated to enhance the benefits of symbiotic nitrogen fixation in the tropics.
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Library ResourceJournal Articles & BooksDecember, 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.
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Library ResourceJournal Articles & BooksDecember, 1982Colombia, 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.
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Library ResourceJournal Articles & BooksDecember, 1982Nigeria, Zambia, Uganda, Mali, Ghana, Cameroon, Côte d'Ivoire, Western Africa, Africa, Eastern Africa, Middle Africa, Southern Africa
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Library ResourceReports & ResearchDecember, 1982Kenya, 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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Library ResourceReports & ResearchDecember, 1982Colombia, Central America, South America
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Library ResourceConference Papers & ReportsDecember, 1982
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Library ResourceJournal Articles & BooksDecember, 1982Colombia, Central America, South America
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Library ResourceConference Papers & ReportsDecember, 1982Central America, South America
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