Biofixation of atmospheric nitrogen in the context of world staple crop production: Policy perspectives

Khan, Muhammad Salar; Koizumi, Naoru; Olds, James L.

doi:10.1016/j.scitotenv.2019.134945

Cited by 17 publications

(16 citation statements)

References 39 publications

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“…Biological (symbiotic) nitrogen fixation (BNF, SNF) is a sustainable and economical alternative for supplying nitrogen to legume crops, including common bean and soybean (Thilakarathna and Raizada, 2018). It can reduce crop input costs by eliminating the need to purchase nitrogen fertilizer and reduce the negative impacts of unused nitrogen in the environment (Stevens et al, 2004;Good and Beatty, 2011;Khan et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Effects of Nitrogen Application on Nitrogen Fixation in Common Bean Production

et al. 2020

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The nitrogen fixing ability of common bean (Phaseolus vulgaris L.) in association with rhizobia is often characterized as poor compared to other legumes, and nitrogen fertilizers are commonly used in bean production to achieve high yields, which in general inhibits nitrogen fixation. In addition, plants cannot take up all the nitrogen applied to the soil as a fertilizer leading to runoff and groundwater contamination. The overall objective of this work is to reduce use of nitrogen fertilizer in common bean production. This would be a major advance in profitability for the common bean industry in Canada and would significantly improve the ecological footprint of the crop. In the current work, 22 bean genotypes [including recombinant inbred lines (RILs) from the Mist × Sanilac population and a non-nodulating mutant (R99)] were screened for their capacity to fix atmospheric nitrogen under four nitrogen regimes. The genotypes were evaluated in replicated field trials on N-poor soils over three years for the percent nitrogen derived from atmosphere (%Ndfa), yield, and a number of yield-related traits. Bean genotypes differed for all analyzed traits, and the level of nitrogen significantly affected most of the traits, including %Ndfa and yield in all three years. In contrast, application of rhizobia significantly affected only few traits, and the effect was inconsistent among the years. Nitrogen application reduced symbiotic nitrogen fixation (SNF) to various degrees in different bean genotypes. This variation suggests that SNF in common bean can be improved through breeding and selection for the ability of bean genotypes to fix nitrogen in the presence of reduced fertilizer levels. Moreover, genotypes like RIL_38, RIL_119, and RIL_131, being both high yielding and good nitrogen fixers, have potential for simultaneous improvement of both traits. However, breeding advancement might be slow due to an inconsistent correlation between these traits.

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Section: Introductionmentioning

confidence: 99%

Effects of Nitrogen Application on Nitrogen Fixation in Common Bean Production

et al. 2020

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“…First, academic literature on the public process literature suggests that in these challenging situations, policy entrepreneurs tend to undertake advocacy coalition building by calling on likeminded groups to support them in public discourse supporting new projects (Weible at al. 2012;Khan et al 2020). This framework helps analysts identify key stakeholders, their position in the public decision-making system, and ways in which their longstanding positions may have shifted in response to events or new pieces of evidence (Pierce et al 2017).…”

Section: Dilemmas In Public Transport Decision Makingmentioning

confidence: 99%

Delivering Urban Mass Transit—The Case of Lahore, Pakistan

Khan¹,

Jamil²,

Malik³

2022

Preprint

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The case of Lahore’s Bus Rapid Transit and Mass Transit investments in this Chapter documents a series of challenges: overlapping roles and responsibilities across a multitude of uncoordinated authorities; proactive opposition to urban developments by civil society groups and opposition political parties; and large-scale untargeted subsidies resulting in unsustainable operational losses. Projects like Lahore Rapid Mass Transit System (LRMTS) involve many conflicting decisions, competing stakeholders, equally appealing alternatives, and booming budgets. Such projects require careful analysis. Multiple lenses—from urban policy, transport policy, and public policy process to public administration theory and public finance—can be employed to analyze these projects. For any such project to be successfully designed and implemented, all stakeholders would have to set aside political and cognitive biases and other narrow interests, prioritize organizational values, and place atop public interest. Finally, any similar project in the region would demand careful mitigation planning, judicious financing schemes, strong historical heritage protection, transparency, and, lastly, a robust in-house capacity to ensure the maintenance of the infrastructure.

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“…O suprimento biológico de Nitrogênio mediado por atividade microbiana para as plantas é uma solução econômica e prontamente disponível, replicável e rentável em larga escala. Além disso, o Nitrogênio tem potencial para influenciar os sumidouros de carbono biológico dos gases do efeito estufa (KHAN et al, 2020).…”

Section: Parâmetros De Qualidade Da áGuaunclassified

Influência Do Uso E Cobertura Da Terra Na Qualidade Da Água Da Bacia Hidrográfica Do Rio Uberabinha – Mg

Gouveia

Pereira

Pissarra

et al. 2022

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This paper aimed to analyze the influence of land use on the quality of water in Uberabinha river basin in the city of Uberlândia (MG). Using geoprocessing techniques and remote sensing data, land use, soil type, slope and hypsometric maps were drawn. Images were taken from the LANDSAT 8 satellite with 30 m space resolution, dated August 18, 2018, and from the Digital Elevation Model TOPODATA/SRTM together with the historical series data about water quality of the Uberabinha river, retrieved from Instituto Mineiro de Gestão das Águas (IGAM) and the Brazilian Ministry of Health. The data about water quality were organized according to the limits established by Conselho Nacional do Meio Ambiente (CONAMA) and international regulation. Uberabinha river basin is mostly used for agriculture. Concerning the water quality sampled from point PB 023, which was sixteen kilometers away from Uberlândia's sewage treatment plant (STP), the concentration of the variables totalscoliform index, Escherichia coli, sulfate, and phosphorus exceeded the limits set by laws between 2012 and 2018. Water quality data were collected on an annually basis, always in August. The land use influenced on the contamination of the basin water, especially, in the course that includes Uberlândia's urban area, due to a greater concentration of the parameters that indicate contamination of domestic and industrial water

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Biofixation of atmospheric nitrogen in the context of world staple crop production: Policy perspectives

Cited by 17 publications

References 39 publications

Effects of Nitrogen Application on Nitrogen Fixation in Common Bean Production

Effects of Nitrogen Application on Nitrogen Fixation in Common Bean Production

Delivering Urban Mass Transit—The Case of Lahore, Pakistan

Influência Do Uso E Cobertura Da Terra Na Qualidade Da Água Da Bacia Hidrográfica Do Rio Uberabinha – Mg

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