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|Title:||Measuring and mapping crop vigour using an active optical sensor in an ultra low-level aircraft||Contributor(s):||Lamb, David (author); Trotter, Mark (author); Schneider, Derek (author)||Publication Date:||2009||Handle Link:||https://hdl.handle.net/1959.11/10142||Abstract:||An ultra low-level aircraft carrying an active NIR/Red CropCircle™ sensor was successfully deployed at an altitude of 3-5 m over a 270 Ha field of skip-row sorghum (Sorghum bicolor) to record and subsequently map photosynthetically-active biomass (PAB) via the simple ratio (SR) index. The 2-D, ULLA-PAB map derived from 20 m transects was found to reproduce the gross patterns of spatial variability observed in a PAB map derived from a metre-resolution airborne digital multispectral image re-sampled to a similar spatial resolution. The fact that this type of sensor contains its own light source hence can be operated irrespective of ambient light conditions offers crop managers a viable alternative to conventional imaging technologies especially when they have day-to-day access to aircraft already conducting low-level operations, for example crop dusting and reconnaissance, over their agricultural fields.||Publication Type:||Conference Publication||Conference Name:||13th Annual Symposium on Precision Agriculture in Australasia, Armidale, Australia, 10th - 11th September, 2009||Source of Publication:||Proceedings of the 13th Annual Symposium on Precision Agriculture in Australasia, p. 31-40||Publisher:||Precision Agriculture Research Group, University of New England||Place of Publication:||Armidale, Australia||Field of Research (FOR):||070104 Agricultural Spatial Analysis and Modelling||HERDC Category Description:||E2 Non-Refereed Scholarly Conference Publication||Other Links:||http://www.une.edu.au/parg/documents/proceedings.pdf||Statistics to Oct 2018:||Visitors: 135
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