Use of precision agriculture technology to investigate spatial variability in nitrogen yields in cut grassland
Identifieur interne : 000986 ( Istex/Checkpoint ); précédent : 000985; suivant : 000987Use of precision agriculture technology to investigate spatial variability in nitrogen yields in cut grassland
Auteurs : John S. Bailey [Royaume-Uni] ; Ke Wang [République populaire de Chine] ; Crawford Jordan [Royaume-Uni] ; Alex Higgins [Royaume-Uni]Source :
- Chemosphere [ 0045-6535 ] ; 2000.
Abstract
Spatial variability in N uptake and utilisation by swards within uniformly managed field units could be responsible for a significant proportion of the NH3, N2O, NO−3 and NOx (NO and NO2) ‘pollutants’ generated by agriculture and released to the environment. An investigation was commenced, therefore, to quantify, map and explain the spatial variability in sward N yield in a ‘large’ silage field and to assess the potential for managing this variability using some of the latest precision agriculture technology. Sward dry matter (DM) and N yields were predicted from the results of plant tissue analyses using mathematical models. Sward N yields were found to vary greatly across the field seemingly because of differences in net soil N mineralisation, but the pattern of variability appeared to remain constant with time. Conventional soil analysis of a range of soil chemical and physical properties, however, failed to explain this variability. It was concluded that the N-yield distribution map might be used in place of soil analysis as the basis for varying the rates of N application to different parts of the field with the twin objectives of maximising fertiliser use efficiency and minimising N emissions to air and water.
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DOI: 10.1016/S0045-6535(00)00118-1
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Bailey</name></author><author><name sortKey="Wang, Ke" sort="Wang, Ke" uniqKey="Wang K" first="Ke" last="Wang">Ke Wang</name></author><author><name sortKey="Jordan, Crawford" sort="Jordan, Crawford" uniqKey="Jordan C" first="Crawford" last="Jordan">Crawford Jordan</name></author><author><name sortKey="Higgins, Alex" sort="Higgins, Alex" uniqKey="Higgins A" first="Alex" last="Higgins">Alex Higgins</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:605E82869A0F62A51A59C5E2CC83FEDD09D226B0</idno><date when="2000" year="2000">2000</date><idno type="doi">10.1016/S0045-6535(00)00118-1</idno><idno type="url">https://api.istex.fr/document/605E82869A0F62A51A59C5E2CC83FEDD09D226B0/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000938</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000938</idno><idno type="wicri:Area/Istex/Curation">000892</idno><idno type="wicri:Area/Istex/Checkpoint">000986</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000986</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Use of precision agriculture technology to investigate spatial variability in nitrogen yields in cut grassland</title><author><name sortKey="Bailey, John S" sort="Bailey, John S" uniqKey="Bailey J" first="John S" last="Bailey">John S. 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An investigation was commenced, therefore, to quantify, map and explain the spatial variability in sward N yield in a ‘large’ silage field and to assess the potential for managing this variability using some of the latest precision agriculture technology. Sward dry matter (DM) and N yields were predicted from the results of plant tissue analyses using mathematical models. Sward N yields were found to vary greatly across the field seemingly because of differences in net soil N mineralisation, but the pattern of variability appeared to remain constant with time. Conventional soil analysis of a range of soil chemical and physical properties, however, failed to explain this variability. It was concluded that the N-yield distribution map might be used in place of soil analysis as the basis for varying the rates of N application to different parts of the field with the twin objectives of maximising fertiliser use efficiency and minimising N emissions to air and water.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li><li>République populaire de Chine</li></country><region><li>Zhejiang</li></region><settlement><li>Hangzhou</li></settlement><orgName><li>Université de Zhejiang</li></orgName></list><tree><country name="Royaume-Uni"><noRegion><name sortKey="Bailey, John S" sort="Bailey, John S" uniqKey="Bailey J" first="John S" last="Bailey">John S. Bailey</name></noRegion><name sortKey="Bailey, John S" sort="Bailey, John S" uniqKey="Bailey J" first="John S" last="Bailey">John S. 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