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Subject listing for: Nitrogen Fixers |
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This brief microbiology and immunology page of the University of Leicester, U.K., discusses Azotobacter's ability to fix atmospheric nitrogen. The page also has links to an on-line video and purchasing information for the CD version.
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This site brings together many links to information on Azotobactor Species and related topics available on the Web. It also provides links to lectures and scientific papers.
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A John Innes Centre (UK) page briefly describes azotobacter's metabolic capabilities that include the ability to fix atmospheric nitrogen without entering into symbioses with plants.
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This brief India Agriculture Resource Center page describes bio-fertilizers, their agronomic importance, and crop responses to their application.
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This article is part of the University of Florida's extension material on soils and water. It discusses the importance, magnitude and diversity of nitrogen fixation, as well as symbiotic and non-symbiotic nitrogen fixation.
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This article in the Overstory (an on-line journal) discusses Rhizobia, nitrogen fixation, inoculants, and why growers might find them useful.
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Part of a botany class Web site from University of Hawai`i at Manoa (USA), this short page contains little written information, but has several photos depicting the symbiosis between cycads and cyanobacteria.
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This page contains an archive of a short discussion on azotobacter that took place on the Cornell University-based MOIST group's MULCH-L e-list in 1998.
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An excellent introduction to the importance of soil biology in farming sustainability with a worldwide perspective, the home section of this FAO site has links to news, events, documents, case studies, and more.
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Una empresa Uruguaya que vende inoculantes para leguminosas y gramineas.
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Part of a crop science Web site from Ohio State University (USA), this page contains information on rhizobium symbiosis and the nitrogen cycle, and instructions for a related lab exercise.
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This site outlines facts about legume seed inoculants, the process of inoculation, types of commercial inoculants, selecting the correct inoculant as well as the storage of inoculum.
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This Society for Systematic and Veterinary Bacteriology's page by J.P. Euzéby contains the rhizobium section of the "List of Bacterial Names with Standing in Nomenclature". There are links to source articles for some of the entries.
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This 4-H Children's Garden Web site by Michigan State University (USA) contains information on and photos of microbes involved in nutrient cycling in soils.
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This section of the "Forage Tree Legumes in Tropical Agriculture" book discusses both non-symbiotic and symbiotic nitrogen fixation.
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This very brief University of Minnesota (USA) page discusses prokaryotic organisms with the ability to fix atmosperic nitrogen in soils.
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This page is an illustrated section of Botany online - The Internet Hypertextbook discussing the reduction of atmospheric nitrogen to ammonia by some bacteria and blue-green algae.
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This section from the Washington Tilth book The Future is Abundant, briefly discusses nitrogen-fixing plants.
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This Indiaagronet page has information on how to separate Rhizobium from nodules, how Rhizobium enters the roots of legumes, and how a nodule is formed.
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A short page by a microbial research group in Norwich, UK, covering details of the nature of gene products and rhizosphere communication for the formation of nodules.
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This searchable University of Minnesota (USA) resource site has information on its research, and rhizobium strain collection, a glossary, FAQ's and more.
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A brief description of root hair cell interaction with lipo-oligosaccharides (Nod-factors) that are excreted from rhizobia and are thought to be the compounds involved in early recognition and signal transduction.
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Part of a botany class Web site from University of Hawai`i at Manoa (USA), this page contains descriptions and images of nitrogen fixation by rhizobium bacteria in legumes.
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This clearly explained and illustrated web-chapter from a New Zealand conservation organization describes the role of soil organisms in the nutrient cycles that characterize farming ecosystems.
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This site which can also be reached from our homepage is the Worldwide Soil Health Portal's guide to seed sources for a variety of planting material including cover crops and green manures, agroforestry species, microsymbionts and more.
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This 1996 proceedings of the third meeting of the Institute for Biodynamic Research in Copenhagen, Denmark is available on-line and contains 7 papers on nitrogen fixation and nitrogen cycling.
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This class project posted on a course webpage from Virginia Tech (USA) contains brief background information on soil microbes such as rhizobium, azotobater, fusarium, and rhizoctonia
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This Biology Teaching Organisation page from the University of Edinburgh (UK), discusses three common types of mycorrhiza: Orchid mycorrhizas, Arbuscular mycorrhizas, and Ectomycorrhizas, and provides links to further information.
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Developed by the Biology Teaching Organisation (from the University of Edinburgh, UK) this page discusses in depth the processes of nitrogen fixation. It also has photos, illustrations, and links to further information.
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This website is a very readable description of the functional groups of micro- and macro-fauna in the soil, and their role in the soil ecosystem.
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This Laboratoire de Biologie Moléculaire des Relations Plantes Microorganismes page (France) has information in English on research on the symbiotic association between Rhizobium meliloti and the self-fertile annual lucerne Medicago truncatula.
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This US Department of Agriculture page contains information on it's rhizobium collection. Cultures are distributed free of charge to recognized institutions and scientists around the world.
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Ohio State University's department of Horticulture and Crop Science put out this brief Extension Fact Sheet with tables describing the value of legumes for plowdown nitrogen.
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