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dc.contributor.authorRoberts, Jessicaen
dc.contributor.authorSuarez Infiesta, A.en
dc.contributor.authorSchäbitz, B.en
dc.contributor.authorFourie, Jacoen
dc.contributor.authorWerner, Arminen
dc.date.accessioned2017-09-01T00:24:43Z
dc.date.issued2015en
dc.identifier.citationRoberts, J., Suarez Infiesta, A., Schäbitz, B., Fourie, J., & Werner, A. (2015). Active optical sensing of canopies in pasture management. Journal of New Zealand Grasslands, 77, 35-40.en
dc.identifier.issn2463-2872en
dc.identifier.urihttps://hdl.handle.net/10182/8502
dc.description.abstractCommercial units of Active Optical Sensor (AOS) systems are designed for sensing arable crops to estimate the required amount of nitrogen fertiliser and are well established in intensive arable cropping systems in Europe. A research version AOS (RU-AOS) of a commercial system was tested as a potential canopy sensor for New Zealand dairy pastures. To study the applicability of this sensor a sensitivity experiment was conducted. Additionally, a plot experiment investigated the relationship between the spectrometer and biomass attributes on ryegrass and white clover canopies fertilised with five different nitrogen amounts. The pasture plots were sensed with the RU-AOS and results compared with measured biomass dry matter and nitrogen amount. For some events a strong linear relationship between dry matter (DM) and the water index (WI) was evident (i.e. r² = 0.80) as well as between nitrogen (N) amount and simple ratio (SR) (i.e. r² = 0.89). The results suggest there is potential for this sensor to estimate New Zealand dairy pasture attributes. This could be used to develop a pasture system similar to commercial arable cropping nitrogen sensor AOSs.en
dc.format.extent35-40en
dc.language.isoenen
dc.publisherNZ Grassland Associationen
dc.relationThe original publication is available from - NZ Grassland Association - https://www.grassland.org.nz/viewpublication.php?pubID=389en
dc.rights© Copyright NZ Grassland Association Inc. All rights reserved.en
dc.subjectActive Optical Sensoren
dc.subjectpastureen
dc.subjectnitrogenen
dc.titleActive optical sensing of canopies in pasture managementen
dc.typeJournal Article
lu.contributor.unitLincoln Universityen
lu.contributor.unitLincoln Agritechen
lu.contributor.uniten
lu.contributor.uniten
dc.subject.anzsrc07 Agricultural and Veterinary Sciencesen
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.relation.isPartOfJournal of New Zealand Grasslandsen
pubs.organisational-group/LU
pubs.organisational-group/LU/Lincoln Agritech
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/2018 PBRF Staff group
pubs.publication-statusPublisheden
pubs.publisher-urlhttps://www.grassland.org.nz/viewpublication.php?pubID=389en
pubs.volume77en
dc.identifier.eissn2463-2880en
lu.identifier.orcid0000-0002-7734-8262
lu.identifier.orcid0000-0002-0039-8202


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