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Download Biological Nitrogen Fixation: Towards Poverty Alleviation by T. H. N. Ellis (auth.), Felix D. Dakora, Samson B. M. PDF

By T. H. N. Ellis (auth.), Felix D. Dakora, Samson B. M. Chimphango, Alex J. Valentine, Claudine Elmerich, William E. Newton (eds.)

This quantity covers fresh advancements in either basic and utilized examine in organic nitrogen fixation. It emphasizes the appliance of organic nitrogen fixation for sustainable agriculture, which should still result in poverty relief, environmental safeguard, and strong agricultural practices as a rule. the jobs of, and advances in, plant breeding, plant molecular biology, nodule body structure, and symbiotic and associative interactions among vegetation and microbes in maintaining agricultural productiveness and soil fertility are defined. The evolution of symbioses and nitrogen fixation also are coated during this quantity. to make sure excessive agricultural productiveness, whereas preserving the surroundings (both soil and water resources), calls for plant cultivars that still reply to worthwhile microbes. the amount, for that reason, describes the body structure and genomics of nitrogen-fixing micro organism including the biochemistry and molecular genetics of the nitrogenase enzyme that really fixes atmospheric nitrogen to a usable shape.

This quantity, which covers the newest information at the function of nitrogen fixation in agriculture and forestry and at the biology of either vegetation and nitrogen-fixing microbes, is meant to function an invaluable reference for college kids and researchers, either within the laboratory (academic and advertisement) and within the box.

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Read or Download Biological Nitrogen Fixation: Towards Poverty Alleviation through Sustainable Agriculture: Proceedings of the 15th International Nitrogen Fixation Congress and the 12th International Conference of the African Association for Biological Nitrogen Fixation PDF

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Additional resources for Biological Nitrogen Fixation: Towards Poverty Alleviation through Sustainable Agriculture: Proceedings of the 15th International Nitrogen Fixation Congress and the 12th International Conference of the African Association for Biological Nitrogen Fixation

Sample text

With an understanding of these constraints, Herridge (2006) identified the following critical research gaps and investment options for increasing broad-scale adoption of Rhizobium-based technology. These were: to increase legume plantings and inoculant F. D. Dakora et al. ), Biological Nitrogen Fixation: Towards Poverty Alleviation through Sustainable Agriculture. V. 2008 25 26 G. W. O’Hara et al. demand; to develop simple rapid “need to inoculate” tests; to enhance farmer knowledge of inoculation, inoculant manufacture, quality control, and distribution; to support Rhizobium R&D capacity; and to improve understanding of the role of legume- in farming systems.

2008 33 34 M. Hungria et al. ) represents the most important source of protein for most countries in South America, with Brazil being the largest grower and consumer of the legume worldwide. Among the rhizobial species, Rhizobium tropici has proven to be outstanding in terms of genetic stability and tolerance to tropical environmental stresses. Strains very effective in fixing N2 belonging to this species have been selected and, when used as inoculants, increase nodulation and N2-fixation rates, allowing plants to produce up to 4,000 kg ha–1 without any N-fertilizer.

Two parameters were suggested to be included into the description of new legume commercial cultivars: “symbiotic effectiveness” (average percentage of additional yield on the score of tripartite symbiosis) and “symbiotic potential” (maximum percentage of additional yield on the score of tripartite symbiosis registered during trials). For the first time in the history of legume breeding, the pea cultivar “Triumph” (Figure 1), which has increased potential for forming a tripartite symbiosis, has been purposefully created with a “symbiotic effectiveness” of 10% (Table 1) and a “symbiotic potential” of 30%.

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