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Title: Using high resolution landscape and soils data to understand spatiotemporal variability in net pasture productivity as derived from low spatial resolution remote sensing
Contributor(s): Donald, Graham (author); Trotter, Mark (author); Lamb, David (author)
Publication Date: 2010
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Abstract: Spatial variability in pasture production, especially at within-field scales challenges land managers seeking to optimise management to increase the overall productivity of their grazing operations. In this study, a relatively coarse, remote, spatial-based measure of net primary production on a farming landscape of predominately tall fescue ('Festuca arundinacea') pasture was derived using accumulative NDVI from weekly MODIS satellite imagery. This data was evaluated against two, higher spatial resolution, on-ground descriptors often linked with productivity; namely soil texture, via a electromagnetic induction instrument (EM38) and elevation data. Net primary production was observed to be larger within the lower slopes and valley floors of paddocks; the same areas most likely associated with higher levels of long term soil moisture. The implications of using relatively low spatial resolution remote sensing products (100-200 m) to monitor and forecast pasture production, and avenues for increasing the spatial resolution of such products using third-party, on-ground datasets like EM38 are also discussed.
Publication Type: Conference Publication
Conference Name: 15th Australian Agronomy Conference: Food Security from Sustainable Agriculture, Lincoln, New Zealand, 15th - 18th November, 2010
Conference Details: 15th Australian Agronomy Conference: Food Security from Sustainable Agriculture, Lincoln, New Zealand, 15th - 18th November, 2010
Source of Publication: Food Security from Sustainable Agriculture: Proceedings of the 15th Australian Agronomy Conference
Publisher: The Regional Institute Ltd
Place of Publication: Online
Field of Research (FOR): 070304 Crop and Pasture Biomass and Bioproducts
070203 Animal Management
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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