Application of aerial imagery to analyse on-farm trials

Basnet, B. and Kelly, R. and Jensen, T. and Kane, T. and Apan, A. and Butler, D. (2002) Application of aerial imagery to analyse on-farm trials. In: 11th Australasian Remote Sensing and Photogrammetry Conference (ARSPC 2002): Images to Information, 2-6 Sept 2002, Brisbane, Australia.

Abstract

Aerial imagery, using a standard four-band multi-spectral video, was taken of an on-farm wheat variety strip-trial in southern Queensland in 2001. The image was explored to highlight within-strip and within-field variability in crop biomass and performance. A good correlation was found between NDVI at flowering and final grain yield (r2 = 0.77; n = 10), suggesting that the image could provide a surrogate measure of yield variability. Transects taken through the centre of each variety strip provided a useful indicator of within-row variability, although spatial correlation was high. Coefficients of variation ranged between 12 and 20% for the variety strips, which suggested that much of the observed variation was due to random effects. Yield differences at harvest between varieties were modest, but pseudo-replication analysis could provide a useful means of determining what might have been an optimal strip length.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Surveying and Land Information
Date Deposited: 07 Nov 2016 02:43
Last Modified: 18 Apr 2018 00:02
Fields of Research : 07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070107 Farming Systems Research
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences
URI: http://eprints.usq.edu.au/id/eprint/29645

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