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Library ResourceDocumentos de política y resúmenesSeptiembre, 2017Zambia, África, África austral
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Library ResourceDiciembre, 2018Rwanda, África Central, África
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Library ResourceDocumentos de política y resúmenesDiciembre, 2017Etiopía, África, África oriental
The agriculture sector is the backbone of Ethiopia’s economy and livelihoods. Yet, heavy reliance on rain-fed systems has made the sector particularly vulnerable to variability in rainfall and temperature. Climate change may decrease national gross domestic product (GDP) by 8–10% by 2050, but adaptation action in agriculture could cut climate shock-related losses by half. • Climate risk management interventions and long-term adaptation actions need to match localized vulnerabilities and impacts.
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Library ResourceArtículos de revistas y librosDiciembre, 2018Colombia, América central, América del Sur
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Library ResourceArtículos de revistas y librosDiciembre, 1997África subsahariana
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Library ResourceArtículos de revistas y librosDiciembre, 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.
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Library ResourceArtículos de revistas y librosDiciembre, 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 ResourceArtículos de revistas y librosDiciembre, 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 ResourceArtículos de revistas y librosDiciembre, 1985Colombia, América central, América del Sur
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.
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Library ResourceArtículos de revistas y librosDiciembre, 1994Colombia, América central, América del Sur
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