Ultrasonic Arrays for Remote Sensing of Pasture Biomass

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dc.citation.issue1
dc.citation.volume12
dc.contributor.authorLegg M
dc.contributor.authorBradley S
dc.date.accessioned2023-10-29T20:26:17Z
dc.date.accessioned2023-11-03T04:55:25Z
dc.date.available2019-12-30
dc.date.available2023-10-29T20:26:17Z
dc.date.available2023-11-03T04:55:25Z
dc.date.issued2020-01
dc.date.updated2023-10-23T21:56:30Z
dc.description.abstractThe profitability of agricultural industries that utilise pasture can be strongly affected by the ability to accurately measure pasture biomass. Pasture height measurement is one technique that has been used to estimate pasture biomass. However, pasture height measurement errors can occur if the sensor is mounted to a farm vehicle that experiences tilting or bouncing. This work describes the development of novel low ultrasonic frequency arrays for pasture biomass estimation. Rather than just measuring the distance to the top of the pasture, as previous ultrasonic studies have done, this hardware is designed to also allow ultrasonic measurements to be made vertically through the pasture to the ground. The hardware was mounted to a farm bike driving over pasture at speeds of up to 20 km/h. The analysed results show the ability of the hardware to measure the ground location through the grass. This allowed pasture height measurement to be independent of tilting and bouncing of the farm vehicle, leading to 20 to 25% improvement in the R2 value obtained for biomass estimation compared with the traditional technique. This corresponded to a reduction in root mean squared error of predicted biomass from about 350 to 270 kg/ha, where the average biomass of the pasture was 1915 kg/ha.
dc.description.confidentialfalse
dc.edition.editionJanuary 2020
dc.identifierARTN 111
dc.identifierhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000515391700111&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=c5bb3b2499afac691c2e3c1a83ef6fef
dc.identifier.citationLegg M, Bradley S. (2020). Ultrasonic arrays for remote sensing of pasture biomass. Remote Sensing. 12. 1.
dc.identifier.doi10.3390/RS12010111
dc.identifier.eissn2072-4292
dc.identifier.elements-typejournal-article
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69029
dc.languageEnglish
dc.publisherMDPI (Basel, Switzerland)
dc.publisher.urihttps://www.mdpi.com/2072-4292/12/1/111
dc.relation.isPartOfRemote Sensing
dc.rights(c) 2019 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectpasture biomass
dc.subjectultrasonic sensing
dc.subjecttransducer
dc.subjectmicrophone
dc.subjectarray
dc.titleUltrasonic Arrays for Remote Sensing of Pasture Biomass
dc.typeJournal article
pubs.elements-id441683
pubs.organisational-groupOther
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