Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/11798
Title: Site-specific measurements of apparent electrical conductivity (ECa) correlate to neutron moisture probe counts: Towards the spatial measurement of soil moisture content for precision agriculture
Contributor(s): Stanley, John  (author); Schneider, Derek  (author)orcid ; Lamb, David  (author)orcid 
Publication Date: 2012
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/11798
Open Access Link: https://www.agronomyaustraliaproceedings.org/images/sampledata/2012/8083_6_stanley.pdfOpen Access Link
Abstract: Precision management of broad acre cropping is limited by our inability to rapidly produce high spatial-resolution maps of soil moisture. We report on a series of site-specific, apparent electrical conductivity (ECa) measurements using the Geonics® EM38 along with near-simultaneous neutron probe measurements during soil moisture extraction by an irrigated cotton crop. This study differs from previous approaches by using polyethylene neutron probe access tubes so that the EM38 could be operated directly over the soil measured by the neutron probe. We discover strong correlations (average R²= 0.90) between ECa and neutron probe counts (NPC) that suggest that ECa surveys could provide a useful spatial measure of soil moisture. The linear relationships between NPC and ECa across a range of background ECa zones for these soils augers well for estimating site-specific moisture content from the coefficient of slope and a site-specific upper limit to ECa representing field capacity (i.e. full point).
Publication Type: Conference Publication
Conference Details: AAC 2012: 16th Australian Agronomy Conference, Armidale, Australia, 14th - 18th October, 2012
Source of Publication: Capturing Opportunities and Overcoming Obstacles in Australian Agronomy: Proceedings of 16th Australian Agronomy Conference, p. 1-4
Publisher: Australian Society of Agronomy Inc
Place of Publication: Armidale, Australia
Fields of Research (FoR) 2008: 070399 Crop and Pasture Production not elsewhere classified
Fields of Research (FoR) 2020: 300499 Crop and pasture production not elsewhere classified
Socio-Economic Objective (SEO) 2008: 820507 Wheat
960999 Land and Water Management of Environments not elsewhere classified
820301 Cotton
Socio-Economic Objective (SEO) 2020: 260312 Wheat
260602 Cotton
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Publisher/associated links: http://www.regional.org.au/au/asa/2012/precision-agriculture/8083_stanleyj.htm
http://www.regional.org.au/au/asa/2012/index.htm
https://www.agronomyaustraliaproceedings.org/index.php/hydrogen/10-2012/319-2012-precision-agriculture-to-edit
Appears in Collections:Conference Publication
School of Environmental and Rural Science
School of Science and Technology

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