Real-time protein monitoring - Australian experiences

Jensen, T. and Zeller, L. and Fox, G. and Town, W. and Kelly, R. (2005) Real-time protein monitoring - Australian experiences. In: 5th European Conference on Precision Agriculture, 9-12 June 2005, Uppsala, Sweden.


A 440 ha paddock of Sorghum (Sorghum bicolor cv Buster and cv MR43) was harvested at 'Well Park' in Queensland, Australia (27.105 degrees S, 151.345 degrees E), in May-June 2004. Prior to harvest, a prototype Cropscan 2000H 'on-the-go' near-infrared (NIR) protein sensor designed by NIR Technology Australia (, was fitted to the bubble-up auger of the contract harvester's New Holland TR66 combine. More than 5000 readings were taken within a 282 ha sub-sample area of the paddock (approximately every 30-40m). Additionally, 120 grab samples were collected from the bubble-up auger and the position of the sample 'tagged' in the yield monitor file. These samples were analysed using laboratory NIR equipment to compare with the 'on-header' unit.
Unfortunately, the samples were outside the calibration set of the instrument and the results were in error. To rectify this situation, 10 of the samples were processed for protein using wet chemistry and added to the calibration set. The 120 samples were repredicted and compared to the protein sensor values. The correlation between the 'grab samples' protein values and values from the protein sensor for the same location in the field was low (R2=0.32). This may have been due to a low population in the calibration set or an offset in the protein sensor. This is being investigated

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author version not held.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Surveying and Land Information
Date Deposited: 20 May 2010 12:09
Last Modified: 02 Jul 2013 23:50
Uncontrolled Keywords: protein; on-header; monitor
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070306 Crop and Pasture Nutrition
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070302 Agronomy
09 Engineering > 0909 Geomatic Engineering > 090999 Geomatic Engineering not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences

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