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https://hdl.handle.net/1959.11/26573
Title: | Rapid measurement of pasture evapotranspiration components using proximal sensors | Contributor(s): | Alam, Muhammad Shahinur (author); Lamb, David W (supervisor); Rahman, Muhammad Moshiur (supervisor) | Publication Date: | 2018 | Open Access: | Yes | Handle Link: | https://hdl.handle.net/1959.11/26573 | Open Access Link: | https://sydney.edu.au/agriculture/pal/documents/2018/PA_SYMPOSIUM_PROCEEDINGS_2018.pdf | Abstract: | Evapotranspiration (ET) is the total amount of water released by a crop or pasture canopy in the form of Transpiration (T) and Evaporation (E). ET accounts for up to 96% of the water loss depending on the types of vegetation cover and climatic conditions (Wilcox et al., 2003). Transpiration is related to the productivity of crops and pasture; whereas, evaporation is the loss of water directly from soil surface. Estimating separately the components of ET in the field is challenging yet it is highly significant in terms of improving crop water use and irrigation efficiency, since a anywhere between 30 and 80% of the water flux can be associated with the all important evaporation component (Wilcox et al., 2003). Sap flow monitoring, using micro-lysimeters or isotopic analysis are the usual options for separately measuring transpiration and evaporation in plants but these are incompatible with in-situ field deployment. In this study a portable and convenient method for separately determining the evapotranspiration components has been developed. When coupled with widely-used active optical sensors, the device can be used to develop, in-situ, relationships between spectro-optical indices such as NDVI and evapotranspiration coefficients (Kc, Kcb and Ke) that characterize actual ET water loss relative to evaporative demand. | Publication Type: | Conference Publication | Conference Details: | Precision Agriculture 2018: 21st Symposium on Precision Agriculture in Australasia, Adelaide, South Australia, Australia, 10th - 11th Septemner, 2018 | Source of Publication: | 21st Precision Agriculture Symposium Proceedings, p. 78-79 | Publisher: | Society of Precision Agriculture Australia (SPAA) | Place of Publication: | Adelaide, Australia | Fields of Research (FoR) 2008: | 170112 Sensory Processes, Perception and Performance 070304 Crop and Pasture Biomass and Bioproducts 070399 Crop and Pasture Production not elsewhere classified |
Fields of Research (FoR) 2020: | 300405 Crop and pasture biomass and bioproducts 520406 Sensory processes, perception and performance |
Socio-Economic Objective (SEO) 2008: | 960303 Climate Change Models 829805 Management of Water Consumption by Plant Production 830406 Sown Pastures (excl. Lucerne) |
Socio-Economic Objective (SEO) 2020: | 190501 Climate change models 100505 Sown pastures (excl. lucerne) 260104 Management of water consumption by plant production |
HERDC Category Description: | E2 Non-Refereed Scholarly Conference Publication | Publisher/associated links: | https://spaa.com.au/events/21st-precision-agriculture-symposium/ |
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Appears in Collections: | Conference Publication School of Science and Technology |
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