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Showing 1 to 20 of 33 for “"Biological Nitrogen Fixation"”.
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Studies on biological nitrogen fixation.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1991
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Evaluation of African trifolium species for growth and biological nitrogen fixation
… combinations were evaluated for growth and biological nitrogen fixation (BNF) in a greenhouse on both soils with limited, adequate, and excessive soil moisture. Rhizobia were also evaluated for survival in desiccated soil (12.5 and 17.5 g H₂O g⁻¹ soil) and for competitive nodule forming …
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Biological nitrogen fixation in a nitrogen limited tropical lake, Lake Chapala, Mexico.
… of my study was to quantify the rate of biological nitrogen fixation in Lake Chapala, Mexico. Lake Chapala is the largest lake in Mexico. It is an ancient, tropical lake which is shaped in an east-west culde-sac with the inflow and outflow at the eastern end. Previous work showed low …
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Examining the effect of rotation sequence on biological nitrogen fixation of pulse crops
Nitrogen (N) is often the most limiting nutrient in prairie crop production and is applied in the greatest quantity. Including pulse crops in rotations has become a popular option due to their ability to form symbiotic relationships with dinitrogen-fixing bacteria. This relationship means pulse …
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Response of maize to selected productivity traits and biological nitrogen fixation in cowpea-maize combinations under conservation farming system.
… evaluate the performance of cowpea genotypes for Biological Nitrogen Fixation (BNF) in conservation farming system. (iii) identify maize – cowpea combinations that result in high water use efficiency (WUE) and nitrogen use efficiency (NUE) for high maize productivity under CF system. The trials …
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Analysis of the Potential for Diazotrophic Endophytes to Increase Efficiency of Bioenergy Crop Production: Growth promotion effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis
… the fertilizer inputs through the enhancement of biological nitrogen fixation. While nitrogen fixing (diazotrophic) endophytes colonize many wild plants, these natural relationships may be disrupted in cultivated crop species where breeding and genotype selection often occur under conditions of …
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Comparative effects of conservation tillage systems on selected soil properties and yields of groundnut(arachis hypogaea)
… as plant development, agronomic aspects such as biological nitrogen fixation and yields under conservation systems remain scanty. A study was carried out during the 2014/15 cropping season at Msekera research station in Chipata, Eastern Zambia to determine effects different conservation practices …
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Comparative effects of conservation tillage systems on selected soil properties and yields of groundnut(arachis hypogaea)
… as plant development, agronomic aspects such as biological nitrogen fixation and yields under conservation systems remain scanty. A study was carried out during the 2014/15 cropping season at Msekera research station in Chipata, Eastern Zambia to determine effects different conservation practices …
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ΠΑΡΑΓΩΓΗ ΠΟΛΥΜΕΡΩΝ ΕΔΑΦΟΒΕΛΤΙΩΤΙΚΩΝ ΚΑΙ ΓΕΩΡΓΙΚΕΣ ΕΦΑΡΜΟΓΕΣ
… THE CLASS OF RHIZOBIA, WHICH ARE RESPONSIBLE FOR BIOLOGICAL NITROGEN FIXATION IN LEGUMES) HAS ALSO BEEN STUDIED MAINLY IN TERMS OF TOXICITY. IN CONCLUSION, WE COULD SAY THAT THE MATERIALS PREPARED PRESENT CONSIDERABLE SWELLING IN WATER, FAVOUR PLANT GROWTH AND HAVE NO NEGATIVE EFFECT ON THE …
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Legume-rhizobia interactions in a complex microbiome
Biological nitrogen fixation is important for agriculture, carbon sequestration, and ecosystem restoration. This is primarily conducted by rhizobia (nitrogen fixing bacteria) in association with legume plants. Most research in improving rhizobial strains involves single strain experiments. However, …
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Legume-rhizobia interactions in a complex microbiome
Biological nitrogen fixation is important for agriculture, carbon sequestration, and ecosystem restoration. This is primarily conducted by rhizobia (nitrogen fixing bacteria) in association with legume plants. Most research in improving rhizobial strains involves single strain experiments. However, …
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The Endophytes of Pediomelum Esculentum: A Unique Case in Legume Evolution
… a prominent nodule former; instead, it grows in nitrogen-limited soils and produces large amounts of protein. This suggests the involvement of biological nitrogen fixation. We have investigated the presence of diazotrophic endophytes in <em>P. esculentum</em>. Bacteria were isolated from wild …
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Diversity of Free-living Nitrogen Fixing Bacteria in the Badlands of South Dakota
<p>Biological Nitrogen Fixation is carried out by a highly diverse group of members of the domains Bacteria and Archaea which express a nitrogenase enzyme complex and are termed diazotrophs. The best known diazotrophs form symbiotic associations with plants, but free-living nitrogen fixing bacteria …
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Drivers And Dynamics Of Harmful Algal Blooms: Understanding Nitrogen Fixation And Bloom Composition In Minnesota Temperate Lakes
… partially reflect an underestimation of internal nitrogen contributions from biological nitrogen fixation, leading to an incomplete understanding of nitrogen dynamics in freshwater systems. Nitrogen fixation by cyanobacteria and heterotrophic bacteria can supplement nitrogen availability, …
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Similarities and variations of the enterobacterial chemotaxis paradigm in Sinorhizobium meliloti
Sinorhizobium meliloti is a nitrogen-fixing endosymbiont of the legume Medicago sativa commonly known as alfalfa. It uses flagellar rotation and chemotaxis to seek roots of host plants to inhabit. This symbiosis serves as a great model system for studying biological nitrogen fixation and …
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Early evolution of environments and metabolism: insights from nitrogen, selenium and sulfur isotopes
… reduction and late Archean enhancement of biological pyrite oxidation on land, leading to increasing fluxes of sulfate and other nutrients to the ocean. In the third part (Chapters 4-7), I further test this hypothesis through analyses of selenium isotopes and abundances. After establishing …
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Development of a Python-based Data Assimilation Framework (PyDAF). Case Study: Refining Ammonia Emissions Through Observation Data
… Over NWGOM, NH3 rose 1.4 ppb, mainly due to biological nitrogen fixation.
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Development of a Python-based Data Assimilation Framework (PyDAF). Case Study: Refining Ammonia Emissions Through Observation Data
… Over NWGOM, NH3 rose 1.4 ppb, mainly due to biological nitrogen fixation.
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Characterization of symbiotically important processes in Sinorhizobium meliloti
Bacteria perform biological nitrogen fixation (BNF) which leads to conversion of N2 to ammonia. One of the best studied models of BNF is the symbiotic association of Sinorhizobium meliloti - Medicago sativa (alfalfa). Since alfalfa is a major source of animal feed and the fourth largest crop grown …
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Ecology of nitrogen-fixing bacteria associated with Miscanthus
… for bioenergy crops, such as Miscanthus. Nitrogen is the most expensive and most limiting nutrient in agricultural systems, so it is necessary to develop strategies to reduce anthropogenic inputs of nitrogen fertilizer. Diazotrophs associated with non-leguminous grasses have great …
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