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Spatial Distribution of Nitrogen on Grazed Karst Landscapes

The impact on water quality by agricultural activity in karst terrain is an important consideration for resource management within the Appalachian region. Karst areas comprise about 18% of the region’s land area. An estimated one-third of the region’s farms, cattle, and agricultural market value are...

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Detalles Bibliográficos
Autores principales: Boyer, Douglas G., Alloush, Ghiath A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: TheScientificWorldJOURNAL 2001
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6084094/
https://www.ncbi.nlm.nih.gov/pubmed/12805831
http://dx.doi.org/10.1100/tsw.2001.374
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author Boyer, Douglas G.
Alloush, Ghiath A.
author_facet Boyer, Douglas G.
Alloush, Ghiath A.
author_sort Boyer, Douglas G.
collection PubMed
description The impact on water quality by agricultural activity in karst terrain is an important consideration for resource management within the Appalachian region. Karst areas comprise about 18% of the region’s land area. An estimated one-third of the region’s farms, cattle, and agricultural market value are located on karst terrain. Mean nitrate concentrations in several karst springs in southeastern West Virginia exhibit a strong linear relationship with the percentage of agriculture land cover. Development of best management practices for efficient nitrogen (N) use and reduction of outflow of N to water from karst areas requires knowledge about N dynamics on those landscapes. Water extractable NO(3)-N and NH(4)-N were measured along transects at four soil depths in two grazed sinkholes and one wooded sinkhole. Distribution of soil NO(3)-N and NH(4)-N were related to frequency of animal presence and to topographic and hydrologic redistribution of soil and fecal matter in the grazed sinkholes. Karst pastures are characterized by under drainage and funneling of water and contaminants to the shallow aquifer. Control of NO(3)-N leaching from karst pasture may depend on management strategies that change livestock grazing behavior in sinkholes and reduce the opportunity for water and contaminants to quickly reach sinkhole drains.
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spelling pubmed-60840942018-08-26 Spatial Distribution of Nitrogen on Grazed Karst Landscapes Boyer, Douglas G. Alloush, Ghiath A. ScientificWorldJournal Research Article The impact on water quality by agricultural activity in karst terrain is an important consideration for resource management within the Appalachian region. Karst areas comprise about 18% of the region’s land area. An estimated one-third of the region’s farms, cattle, and agricultural market value are located on karst terrain. Mean nitrate concentrations in several karst springs in southeastern West Virginia exhibit a strong linear relationship with the percentage of agriculture land cover. Development of best management practices for efficient nitrogen (N) use and reduction of outflow of N to water from karst areas requires knowledge about N dynamics on those landscapes. Water extractable NO(3)-N and NH(4)-N were measured along transects at four soil depths in two grazed sinkholes and one wooded sinkhole. Distribution of soil NO(3)-N and NH(4)-N were related to frequency of animal presence and to topographic and hydrologic redistribution of soil and fecal matter in the grazed sinkholes. Karst pastures are characterized by under drainage and funneling of water and contaminants to the shallow aquifer. Control of NO(3)-N leaching from karst pasture may depend on management strategies that change livestock grazing behavior in sinkholes and reduce the opportunity for water and contaminants to quickly reach sinkhole drains. TheScientificWorldJOURNAL 2001-11-29 /pmc/articles/PMC6084094/ /pubmed/12805831 http://dx.doi.org/10.1100/tsw.2001.374 Text en Copyright © 2001 Douglas G. Boyer and Ghiath A. Alloush. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Boyer, Douglas G.
Alloush, Ghiath A.
Spatial Distribution of Nitrogen on Grazed Karst Landscapes
title Spatial Distribution of Nitrogen on Grazed Karst Landscapes
title_full Spatial Distribution of Nitrogen on Grazed Karst Landscapes
title_fullStr Spatial Distribution of Nitrogen on Grazed Karst Landscapes
title_full_unstemmed Spatial Distribution of Nitrogen on Grazed Karst Landscapes
title_short Spatial Distribution of Nitrogen on Grazed Karst Landscapes
title_sort spatial distribution of nitrogen on grazed karst landscapes
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6084094/
https://www.ncbi.nlm.nih.gov/pubmed/12805831
http://dx.doi.org/10.1100/tsw.2001.374
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