Computer‐based evaluation of methods to sample nitrate leached from grazed pasture
Identifieur interne : 000507 ( Istex/Corpus ); précédent : 000506; suivant : 000508Computer‐based evaluation of methods to sample nitrate leached from grazed pasture
Auteurs : L. Lilburne ; S. Carrick ; T. Webb ; J. MoirSource :
- Soil Use and Management [ 0266-0032 ] ; 2012-03.
English descriptors
Abstract
Scientists, land managers and environmental regulators all want to quantify the amount of nitrate leached into groundwater to better understand and manage the risk of environmental contamination from agricultural land, including grazed pasture. The ability of current technology to adequately measure the nitrate leached from a grazed paddock is tested in a stochastic simulation study. Results show that impractical numbers of samplers are needed to achieve estimates accurate to within ±20% of the true value. Rather than trying to directly measure paddock‐scale leaching under grazing, we suggest that further consideration be given to wider application of controlled application of nitrogen onto a few lysimeters and then extrapolate from the resulting measurements of leached nitrate to the paddock scale and beyond based on urine patch coverage.
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DOI: 10.1111/j.1475-2743.2011.00378.x
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Rather than trying to directly measure paddock‐scale leaching under grazing, we suggest that further consideration be given to wider application of controlled application of nitrogen onto a few lysimeters and then extrapolate from the resulting measurements of leached nitrate to the paddock scale and beyond based on urine patch coverage.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>Nitrate leaching</term></item><item><term>urine patches</term></item><item><term>suction cup</term></item><item><term>lysimeter</term></item><item><term>spatial sampling</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2012-03">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/EADB244A90FD48724D3D2368E2A4A2C7720ECB39/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1475-2743</doi><issn type="print">0266-0032</issn><issn type="electronic">1475-2743</issn><idGroup><id type="product" value="SUM"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="SOIL USE MANAGEMENT">Soil Use and Management</title></titleGroup></publicationMeta><publicationMeta level="part" position="03101"><doi origin="wiley">10.1111/sum.2012.28.issue-1</doi><numberingGroup><numbering type="journalVolume" number="28">28</numbering><numbering type="journalIssue" number="1">1</numbering></numberingGroup><coverDate startDate="2012-03">March 2012</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="3" status="forIssue"><doi origin="wiley">10.1111/j.1475-2743.2011.00378.x</doi><idGroup><id type="unit" value="SUM378"></id></idGroup><titleGroup><title type="tocHeading1">Soil nutrient management</title></titleGroup><copyright>© 2011 Landcare Research New Zealand Ltd. Journal compilation © 2011 British Society of Soil Science</copyright><eventGroup><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:3.1.3 standalone mode:FullText" date="2012-03-05"></event><event type="publishedOnlineEarlyUnpaginated" date="2011-11-28"></event><event type="firstOnline" date="2011-11-28"></event><event type="publishedOnlineFinalForm" date="2012-03-05"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-02-08"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.3.4 mode:FullText" date="2015-02-25"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="19">19</numbering><numbering type="pageLast" number="26">26</numbering></numberingGroup><correspondenceTo>L. Lilburne. E‐mail: <email>lilburnel@landcareresearch.co.nz</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:SUM.SUM378.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received May 2011; accepted after revision September 2011</unparsedEditorialHistory><countGroup><count type="figureTotal" number="7"></count><count type="tableTotal" number="3"></count></countGroup><titleGroup><title type="main">Computer‐based evaluation of methods to sample nitrate leached from grazed pasture</title><title type="shortAuthors"><i>L. 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The ability of current technology to adequately measure the nitrate leached from a grazed paddock is tested in a stochastic simulation study. Results show that impractical numbers of samplers are needed to achieve estimates accurate to within ±20% of the true value. Rather than trying to directly measure paddock‐scale leaching under grazing, we suggest that further consideration be given to wider application of controlled application of nitrogen onto a few lysimeters and then extrapolate from the resulting measurements of leached nitrate to the paddock scale and beyond based on urine patch coverage.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Computer‐based evaluation of methods to sample nitrate leached from grazed pasture</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Sampling nitrate leached under pasture</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Computer‐based evaluation of methods to sample nitrate leached from grazed pasture</title></titleInfo><name type="personal"><namePart type="given">L.</namePart><namePart type="family">Lilburne</namePart><affiliation>Landcare Research, PO Box 40, Lincoln, Canterbury, New Zealand</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Carrick</namePart><affiliation>Landcare Research, PO Box 40, Lincoln, Canterbury, New Zealand</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.</namePart><namePart type="family">Webb</namePart><affiliation>Landcare Research, PO Box 40, Lincoln, Canterbury, New Zealand</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Moir</namePart><affiliation>Lincoln University, PO Box 84, Lincoln 7647, Canterbury, New Zealand</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2012-03</dateIssued><edition>Received May 2011; accepted after revision September 2011</edition><copyrightDate encoding="w3cdtf">2012</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">7</extent><extent unit="tables">3</extent></physicalDescription><abstract lang="en">Scientists, land managers and environmental regulators all want to quantify the amount of nitrate leached into groundwater to better understand and manage the risk of environmental contamination from agricultural land, including grazed pasture. The ability of current technology to adequately measure the nitrate leached from a grazed paddock is tested in a stochastic simulation study. Results show that impractical numbers of samplers are needed to achieve estimates accurate to within ±20% of the true value. Rather than trying to directly measure paddock‐scale leaching under grazing, we suggest that further consideration be given to wider application of controlled application of nitrogen onto a few lysimeters and then extrapolate from the resulting measurements of leached nitrate to the paddock scale and beyond based on urine patch coverage.</abstract><subject lang="en"><genre>keywords</genre><topic>Nitrate leaching</topic><topic>urine patches</topic><topic>suction cup</topic><topic>lysimeter</topic><topic>spatial sampling</topic></subject><relatedItem type="host"><titleInfo><title>Soil Use and Management</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0266-0032</identifier><identifier type="eISSN">1475-2743</identifier><identifier type="DOI">10.1111/(ISSN)1475-2743</identifier><identifier type="PublisherID">SUM</identifier><part><date>2012</date><detail type="volume"><caption>vol.</caption><number>28</number></detail><detail type="issue"><caption>no.</caption><number>1</number></detail><extent unit="pages"><start>19</start><end>26</end></extent></part></relatedItem><identifier type="istex">EADB244A90FD48724D3D2368E2A4A2C7720ECB39</identifier><identifier type="DOI">10.1111/j.1475-2743.2011.00378.x</identifier><identifier type="ArticleID">SUM378</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2011 Landcare Research New Zealand Ltd. 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