Determination of discrete element model parameters for a cohesive soil and validation through narrow point opener performance analysis

Article


Aikins, Kojo Atta, Ucgul, Mustafa, Barr, James B., Jensen, Troy A., Antille, Diogenes L. and Desbiolles, Jack M. A.. 2021. "Determination of discrete element model parameters for a cohesive soil and validation through narrow point opener performance analysis." Soil and Tillage Research. 213, pp. 1-13. https://doi.org/10.1016/j.still.2021.105123
Article Title

Determination of discrete element model parameters for a cohesive soil and validation through narrow point opener performance analysis

ERA Journal ID5270
Article CategoryArticle
AuthorsAikins, Kojo Atta (Author), Ucgul, Mustafa (Author), Barr, James B. (Author), Jensen, Troy A. (Author), Antille, Diogenes L. (Author) and Desbiolles, Jack M. A. (Author)
Journal TitleSoil and Tillage Research
Journal Citation213, pp. 1-13
Article Number105123
Number of Pages13
Year2021
PublisherElsevier
Place of PublicationAmsterdam, Netherlands
ISSN0167-1987
0933-3630
Digital Object Identifier (DOI)https://doi.org/10.1016/j.still.2021.105123
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0167198721001963?via%3Dihub
Abstract

The discrete element method (DEM) is a powerful tool that can be used to predict soil disturbance and soil cutting forces to assist design optimisation of soil cutting tools. In this study, DEM input parameters were calibrated to model a cohesive soil (Black Vertosol of southern Queensland, Australia) using the hysteretic spring contact model, coupled with linear cohesion model, and nominal particle radius of 5 mm. DEM simulations were validated using experimental results for the effects of opener rake angle and cutting edge chamfer, and bentleg opener shank offset on no-tillage narrow point opener performance. Overall, DEM results closely agreed with experimental results and exhibited similar trends. By using particle displacement analysis to predict loosened furrow boundary, most predictions of furrow parameters namely furrow cross-sectional area, furrow width, and critical depth had relative errors ranging from 1 % to 19 %. Lateral soil throw was predicted with relative errors of 0.2 %–9 %, except for the straight opener with 45° rake angle (-32 %). Ridge height was over predicted in all cases due to larger DEM particles than actual soil particles used. Relative errors of 20 %, 22 %, -31 %, and -5 % in draught were recorded for the straight openers with 90° (blunt), 90° (chamfered), and 45° rake angles, and the bentleg opener, respectively. These results show that DEM and the input parameters determined to model the cohesive soil of this study can be used to reliably assess furrow opener performance.

Keywordsbentleg opener, black vertosol, furrow profile, tillage force prediction, soil tool modelling
ANZSRC Field of Research 2020409901. Agricultural engineering
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Byline AffiliationsCentre for Agricultural Engineering
University of South Australia
Institution of OriginUniversity of Southern Queensland
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Antille, Diogenes L., Bennett, John McL. and Jensen, Troy A.. 2016. "Soil compaction and controlled traffic considerations in Australian cotton-farming systems." Crop and Pasture Science. 67 (1), pp. 1-28. https://doi.org/10.1071/CP15097
The potential of controlled traffic farming to mitigate greenhouse gas emissions and enhance carbon sequestration in arable land: a critical review
Antille, D. L., Chamen, W. C. T., Tullberg, J. N. and Lal, R.. 2015. "The potential of controlled traffic farming to mitigate greenhouse gas emissions and enhance carbon sequestration in arable land: a critical review." Transactions of the ASABE. 58 (3), pp. 707-731. https://doi.org/10.13031/trans.58.11049
Influence of metal coating on sorghum milling process subjected to three body abrasion
Al-Sandooq, Jaafar Mahdi, Yousif, Belal and Jensen, T. A.. 2015. "Influence of metal coating on sorghum milling process subjected to three body abrasion." International Journal of Precision Technology. 5 (1), pp. 27-42. https://doi.org/10.1504/IJPTECH.2015.069972
An investigation into the fertilizer particle dynamics off-the-disc
Antille, D. L., Gallar, L., Miller, P. C. H. and Godwin, R. J.. 2015. "An investigation into the fertilizer particle dynamics off-the-disc." Applied Engineering in Agriculture. 31 (1), pp. 49-60. https://doi.org/10.13031/aea.31.10729
Land suitability evaluation to optimize land management of small-scale farms in the Gerado catchment, North-Eastern Ethiopia
Bahir, Asmamaw L., Ahmed, Mohammed A. and Antille, Diogenes L.. 2015. "Land suitability evaluation to optimize land management of small-scale farms in the Gerado catchment, North-Eastern Ethiopia." Tropical Agriculture. 92 (1), pp. 49-68.
Field-scale evaluation of calcium ammonium nitrate, urea, and urea treated with N-(n-butyl) thiophosphoric triamide applied to grassland in Ireland
Antille, Diogenes L., Hoekstra, Nyncke J. and Lalor, Stanley T. J.. 2015. "Field-scale evaluation of calcium ammonium nitrate, urea, and urea treated with N-(n-butyl) thiophosphoric triamide applied to grassland in Ireland." Communications in Soil Science and Plant Analysis. 46 (11), pp. 1345-1361. https://doi.org/10.1080/00103624.2015.1033540
Potential to increase productivity and sustainability in Argentinean agriculture with controlled traffic farming: a short discussion
Antille, Diogenes L., Imhoff, Silvia C., Alesso, Carlos A., Chamen, William C. T. and Tullberg, Jeff N.. 2015. "Potential to increase productivity and sustainability in Argentinean agriculture with controlled traffic farming: a short discussion." Acta Technologica Agriculturae . 18 (3), pp. 83-87. https://doi.org/10.1515/ata-2015-0016
Advances in cotton harvesting technology: a review and implications for the John Deere round baler cotton picker
Bennett, John McL., Woodhouse, Nathan P., Keller, Thomas, Jensen, Troy A. and Antille, Diogenes L.. 2015. "Advances in cotton harvesting technology: a review and implications for the John Deere round baler cotton picker." Journal of Cotton Science. 19 (2), pp. 225-249.
Issues related to waste sewage sludge drying under superheated steam
Hamawand, Ihsan, da Silva, Wilton Pereira, Eberhard, Friederike and Antille, Diogenes L.. 2015. "Issues related to waste sewage sludge drying under superheated steam." Polish Journal of Chemical Technology. 17 (4), pp. 5-14. https://doi.org/10.1515/pjct-2015-0062
Field-scale evaluation of furrow fertigation using liquid nitrogen
Antille, Diogenes L. and McCarthy, Alison C.. 2014. "Field-scale evaluation of furrow fertigation using liquid nitrogen." 17th Australian Cotton Conference (ACC 2014): Our Fibre, Our Focus, Our Future. Gold Coast, Australia 05 - 07 Aug 2014 Narrabri, Australia.
Prediction of sugarcane quality parameters using visible-shortwave near infrared spectroradiometer
Nawi, Nazmi Mat, Rowshon, Kamal Md., Chen, Guangnan and Jensen, Troy. 2014. "Prediction of sugarcane quality parameters using visible-shortwave near infrared spectroradiometer." Agriculture and Agricultural Science Procedia. 2, pp. 136 -143. https://doi.org/10.1016/j.aaspro.2014.11.020
Soil compaction and controlled traffic considerations in Australian cotton farming systems
Antille, D. L., Bennett, J. McL. and Jensen, T.. 2015. Soil compaction and controlled traffic considerations in Australian cotton farming systems. Toowoomba, Australia. University of Southern Queensland.
Prediction of sugarcane quality from juice samples using portable spectroscopy
Nawi, Nazmi M., Chen, Guangnan and Jensen, Troy. 2014. "Prediction of sugarcane quality from juice samples using portable spectroscopy." Journal of Mechanical Engineering and Sciences. 7, pp. 1219-1226. https://doi.org/10.15282/jmes.7.2014.21.0119
Quantifying the impacts of coal seam gas (CSG) activities on the soil resource of agricultural lands in Queensland, Australia
Vacher, C. A., White, S., Eberhard, J., Schmidt, E., Huth, N. I. and Antille, D. L.. 2014. "Quantifying the impacts of coal seam gas (CSG) activities on the soil resource of agricultural lands in Queensland, Australia." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2014). Montreal, Canada 13 - 16 Jul 2014 St. Joseph, MI. United States.
Understanding the JD7760 round module picker impacts
Bennett, J. McL., Jensen, T. A., Antille, D. and Woodhouse, N.. 2014. "Understanding the JD7760 round module picker impacts." 17th Australian Cotton Conference (ACC 2014): Our Fibre, Our Focus, Our Future. Gold Coast, Australia 05 - 07 Aug 2014 Narrabri, Australia.
An assessment of sugarcane yield monitoring concepts and techniques from commercial yield monitoring systems
Jensen, T. A., Baillie, C., Bramley, R. G. V. and Panitz, J. H.. 2013. "An assessment of sugarcane yield monitoring concepts and techniques from commercial yield monitoring systems." International Sugar Journal: a technical and commercial periodical devoted entirely to the sugar and sweetener industry. 115 (1369), pp. 53-57.
Sugarcane yield monitoring: a protocol for yield map interpolation and key considerations in the collection of yield data
Bramley, R. G. V. and Jensen, T. A.. 2013. "Sugarcane yield monitoring: a protocol for yield map interpolation and key considerations in the collection of yield data." Bruce, R. C. (ed.) 35th Annual Conference of the Australian Society of Sugar Cane Technologists (ASSCT 2013). Townsville, Australia 16 - 18 Apr 2013 Mackay, Australia.
Controlled traffic farming in Argentina: challenges and opportunities
Antille, Dio, Uriza, L. M., Villena, S. and Chamen, W. C. T.. 2013. "Controlled traffic farming in Argentina: challenges and opportunities." 1st International Controlled Traffic Farming Conference (CTF 2013). Toowoomba, Australia 25 - 27 Feb 2013
Application of spectroscopic method to predict sugar content of sugarcane internodes
Nawi, N. M., Jensen, T. and Chen, G.. 2014. "Application of spectroscopic method to predict sugar content of sugarcane internodes." Journal of Tropical Agriculture and Food Science. 41 (2), pp. 211-220.
Change in the cotton harvesting system: a review and implications for the John Deere 7760 cotton picker
Woodhouse, N. P., Bennett, J. McL. and Jensen, T. A.. 2013. Change in the cotton harvesting system: a review and implications for the John Deere 7760 cotton picker. Toowoomba, Australia. University of Southern Queensland.
The effects of tyre size on soil deformation and soil bulk density changes
Antille, D. L., Ansorge, D., Dresser, M. L. and Godwin, R. J.. 2008. "The effects of tyre size on soil deformation and soil bulk density changes." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2008). Providence, United States 29 Jun - 02 Jul 2008 St. Joseph, MI. United States. https://doi.org/10.13031/2013.25127
Organomineral fertilisers: nitrogen dynamics and evaluation of agronomic characteristics
Antille, D. L., Sakrabani, R. and Godwin, R. J.. 2008. "Organomineral fertilisers: nitrogen dynamics and evaluation of agronomic characteristics ." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2008). Providence, United States 29 Jun - 02 Jul 2008 St. Joseph, MI. United States. https://doi.org/10.13031/2013.25085
Organomineral fertilisers: nutrient dynamics and evaluation of agronomic characteristics
Antille, D. L., Sakrabani, R. and Godwin, R. J.. 2009. "Organomineral fertilisers: nutrient dynamics and evaluation of agronomic characteristics ." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2009). Reno, United States 21 - 24 Jun 2009 St. Joseph, MI. United States. https://doi.org/10.13031/2013.27018
The effect of soil moisture deficit on the susceptibility of soil to compaction as a result of vehicle traffic
Vero, S. E., Antille, D. L., Lalor, S. T. J. and Holden, N. M.. 2012. "The effect of soil moisture deficit on the susceptibility of soil to compaction as a result of vehicle traffic ." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2012). Dallas, United States 29 Jul - 01 Aug 2012 St. Joseph, MI. United States. https://doi.org/10.13031/2013.42046
Development of organomineral fertilisers derived from nutrient-enriched biosolids granules: product specification
Antille, D. L., Sakrabani, R., Tyrrel, S. F., Le, M. S. and Godwin, R. J.. 2013. "Development of organomineral fertilisers derived from nutrient-enriched biosolids granules: product specification." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2013). Kansas City, United States 21 - 24 Jul 2013 St. Joseph, MI. United States. https://doi.org/10.13031/aim.20131620153
Field studies on the value of organomineral fertilisers as amendments for perennial ryegrass (Lolium perenne L)
Antille, D. L., Sakrabani, R. and Godwin, R. J.. 2013. "Field studies on the value of organomineral fertilisers as amendments for perennial ryegrass (Lolium perenne L) ." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2013). Kansas City, United States 21 - 24 Jul 2013 St. Joseph, MI. United States. https://doi.org/10.13031/aim.20131620220
Nitrogen and phosphorus availability following topsoil application of mineral and organomineral fertilisers (OMF)
Antille, D. L., Sakrabani, R. and Godwin, R. J.. 2012. "Nitrogen and phosphorus availability following topsoil application of mineral and organomineral fertilisers (OMF)." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2012). Dallas, United States 29 Jul - 01 Aug 2012 St. Joseph, MI. United States. https://doi.org/10.13031/2013.41937
Evaluation of calcium ammonium nitrate and urea-based fertilisers applied to grassland in Ireland
Antille, D. L., Hoekstra, N. J., Ernfors, M., Richards, K. and Lalor, S. T. J.. 2013. "Evaluation of calcium ammonium nitrate and urea-based fertilisers applied to grassland in Ireland ." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2013). Kansas City, United States 21 - 24 Jul 2013 St. Joseph, MI. United States. https://doi.org/10.13031/aim.20131620284
Determining the particle size range of organomineral fertilisers based on the spreading characteristics of the material
Antille, D. L., Gallar-Redondo, L. and Godwin, R. J.. 2013. "Determining the particle size range of organomineral fertilisers based on the spreading characteristics of the material ." American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2013). Kansas City, United States 21 - 24 Jul 2013 St. Joseph, MI. United States. https://doi.org/10.13031/aim.20131620197
Effects of biosolids-derived organomineral fertilizers, urea, and biosolids granules on crop and soil established with ryegrass (Lolium perenne L.)
Antille, Diogenes L., Sakrabani, Ruben and Godwin, Richard J.. 2014. "Effects of biosolids-derived organomineral fertilizers, urea, and biosolids granules on crop and soil established with ryegrass (Lolium perenne L.) ." Communications in Soil Science and Plant Analysis. 45 (12), pp. 1605-1621. https://doi.org/10.1080/00103624.2013.875205
Field evaluation of soil moisture deficit thresholds for limits to trafficability with slurry spreading equipment on grassland
Vero, S. E., Antille, D. L., Lalor, S. T. J. and Holden, N. M.. 2014. "Field evaluation of soil moisture deficit thresholds for limits to trafficability with slurry spreading equipment on grassland ." Soil Use and Management. 30 (1), pp. 69-77. https://doi.org/10.1111/sum.12093
Technological and integrated approaches for practical and rapid assessment of compaction in agricultural soils: a review.
Bennett, J. McL., Antille, D. L. and Raine, S. R.. 2013. Technological and integrated approaches for practical and rapid assessment of compaction in agricultural soils: a review. Toowoomba, Australia. University of Southern Queensland.
In-field measurement and sampling technologies for monitoring quality in the sugarcane industry: a review
Nawi, Nazmi Mat, Chen, Guangnan and Jensen, Troy. 2014. "In-field measurement and sampling technologies for monitoring quality in the sugarcane industry: a review." Precision Agriculture. 15 (6), pp. 684-703. https://doi.org/10.1007/s11119-014-9362-9
Field-scale evaluation of biosolids-derived organomineral fertilisers applied to ryegrass (Lolium perenne L.) in England
Antille, Diogenes L., Sakrabani, Ruben and Godwin, Richard J.. 2013. "Field-scale evaluation of biosolids-derived organomineral fertilisers applied to ryegrass (Lolium perenne L.) in England." Applied and Environmental Soil Science. 2013, pp. 1-9. https://doi.org/10.1155/2013/960629
Characterisation of organomineral fertilisers derived from nutrient-enriched biosolids granules
Antille, Diogenes L., Sakrabani, Ruben, Tyrrel, Sean F., Le, Minh S. and Godwin, Richard J.. 2013. "Characterisation of organomineral fertilisers derived from nutrient-enriched biosolids granules." Applied and Environmental Soil Science. 2013, pp. 1-11. https://doi.org/10.1155/2013/694597
Soil displacement and soil bulk density changes as affected by tire size
Antille, D. L., Ansorge, D., Dresser, M. L. and Godwin, R. J.. 2013. "Soil displacement and soil bulk density changes as affected by tire size." Transactions of the ASABE. 56 (5), pp. 1683-1693. https://doi.org/10.13031/trans.56.988
Visible and shortwave near infrared spectroscopy for predicting sugar content of sugarcane based on a cross-sectional scanning method
Nawi, Nazmi Mat, Chen, Guangnan and Jensen, Troy. 2013. "Visible and shortwave near infrared spectroscopy for predicting sugar content of sugarcane based on a cross-sectional scanning method." Journal of Near Infrared Spectroscopy. 21 (4), pp. 289-297. https://doi.org/10.1255/jnirs.1060
Visible and shortwave near infrared spectroscopy to predict sugarcane quality from clear and raw juice samples
Nawi, N. M., Chen, G. and Jensen, T.. 2013. "Visible and shortwave near infrared spectroscopy to predict sugarcane quality from clear and raw juice samples." 3rd Malaysian Postgraduate Conference (MPC 2013). Sydney, Australia 04 - 05 Jul 2013 Sydney, Australia.
Application of visible and shortwave near infrared spectrometer to predict sugarcane quality from different sample forms
Nawi, Nazmi Mat, Chen, Guangnan and Jensen, Troy. 2013. "Application of visible and shortwave near infrared spectrometer to predict sugarcane quality from different sample forms." Kondo, Naoshi (ed.) 1st International Conference on Sensing Technologies for Biomaterial, Food and Agriculture (SeTBio 2013). Yokohama, Japan 23 - 25 Apr 2013 Bellingham, WA. United States. SPIE - International Society for Optical Engineering. https://doi.org/10.1117/12.2029395
Precision agriculture technologies for the Australian nut industries
McCarthy, Alison and Jensen, Troy. 2012. "Precision agriculture technologies for the Australian nut industries." 3rd Australian Nut Industry Research Forum (ANIC 2012). Brisbane, Australia 21 Sep 2012 Gold Coast, Australia.
Within block spatial variation in CCS: another potentially important consideration in the application of precision agriculture to sugarcane production
Bramley, R. G. V., Panitz, J. H., Jensen, T. A. and Baillie, C. P.. 2012. "Within block spatial variation in CCS: another potentially important consideration in the application of precision agriculture to sugarcane production." Bruce, R. C. (ed.) 34th Annual Conference of the Australian Society of Sugar Cane Technologists (ASSCT 2012). Palm Cove, Australia 01 - 04 May 2012 Mackay, Australia.
An assessment of sugarcane yield monitoring concepts and techniques from commercial yield monitoring systems
Jensen, T. A., Baillie, C., Bramley, R. G. V. and Panitz, J. H.. 2012. "An assessment of sugarcane yield monitoring concepts and techniques from commercial yield monitoring systems." Bruce, R. C. (ed.) 34th Annual Conference of the Australian Society of Sugar Cane Technologists (ASSCT 2012). Palm Cove, Australia 01 - 04 May 2012 Mackay, Australia.
Sustainable biomass supply chain for the Mallee woody crop industry
Schmidt, Erik, Giles, Rick, Davis, Rod, Baillie, Craig, Jensen, Troy, Sandell, Gary and Norris, Chris. 2012. Sustainable biomass supply chain for the Mallee woody crop industry. Canberra, Australia. Rural Industries Research and Development Corporation.
Prediction and classification of sugar content of sugarcane based on skin scanning using visible and shortwave near infrared
Nawi, Nazmi Mat, Chen, Guangnan, Jensen, Troy and Mehdizadeh, Saman Abdanan. 2013. "Prediction and classification of sugar content of sugarcane based on skin scanning using visible and shortwave near infrared." Biosystems Engineering. 115 (2), pp. 154-161. https://doi.org/10.1016/j.biosystemseng.2013.03.005
Tribological consideration in roller mill machines for agriculture applications
Al-Sandooq, J. M., Yousif, B. F. and Jensen, T. A.. 2012. "Tribological consideration in roller mill machines for agriculture applications." Surface Review and Letters. 19 (6), pp. 1250065-1. https://doi.org/10.1142/S0218625X12500655
The application of spectroscopic methods to predict sugarcane quality based on stalk cross-sectional scanning
Nawi, Nazmi Mat, Jensen, Troy and Chen, Guangnan. 2012. "The application of spectroscopic methods to predict sugarcane quality based on stalk cross-sectional scanning." American Society of Sugar Cane Technologists Journal. 32, pp. 16-27.
Potential technologies to measure sugarcane quality in the field
Nawi, Nazmi Mat, Chen, Guangnan, Jensen, Troy and Baillie, Craig. 2012. "Potential technologies to measure sugarcane quality in the field." 2012 International Conference of Agricultural Engineering (CIGR-AgEng 2012). Valencia, Spain 08 - 12 Jul 2012 Valencia, Spain.
Prediction of sugar content along the height of sugarcane internodes using VisNIR
Nawi, Nazmi Mat, Chen, Guangnan, Jensen, Troy and Baillie, Craig. 2012. "Prediction of sugar content along the height of sugarcane internodes using VisNIR." 2012 International Conference of Agricultural Engineering (CIGR-AgEng 2012). Valencia, Spain 08 - 12 Jul 2012 Valencia, Spain.
Evaluating tractor performance and exhaust gas emissions using biodiesel from cotton seed oil
Al-lwayzy, Saddam H., Yusaf, Talal and Jensen, Troy. 2012. "Evaluating tractor performance and exhaust gas emissions using biodiesel from cotton seed oil." 1st International Conference of Mechanical Engineering Research (ICMER 2011). Kuantan, Malaysia 05 - 07 Dec 2011 United States. Informa UK(IOP Books). https://doi.org/10.1088/1757-899X/36/1/012042
The use of an unmanned aerial vehicle as a remote sensing platform in agriculture
Jensen, T. A., Zeller, L. C. and Apan, A. A.. 2011. "The use of an unmanned aerial vehicle as a remote sensing platform in agriculture." Australian Journal of Multi-Disciplinary Engineering. 8 (2), pp. 139-146.
Transferring technology of measuring sugarcane quality from the laboratory to the field: what is possible?
Nawi, Nazmi Mat, Chen, Guangnan, Jensen, Troy and Baillie, Craig. 2011. "Transferring technology of measuring sugarcane quality from the laboratory to the field: what is possible?" Banhazi, T., Saunders, C. and Hegarty, R. (ed.) SEAg 2011: Diverse Challenges, Innovative Solutions. Gold Coast, Australia 29 - 30 Sep 2011 Canberra, Australia.
The application of spectroscopic methods to predict sugarcane quality based on stalk cross-sectional scanning
Nawi, Nazmi Mat, Jensen, Troy, Chen, Guangnan and Baillie, Craig. 2011. "The application of spectroscopic methods to predict sugarcane quality based on stalk cross-sectional scanning." Banhazi, T., Saunders, C. and Hegarty, R. (ed.) SEAg 2011: Diverse Challenges, Innovative Solutions. Gold Coast, Australia 29 - 30 Sep 2011 Canberra, Australia.
Mechanical harvesting reduces sphacelia/sclerote levels of claviceps africana
Ryley, M. J., Jensen, T. and Kyei, A. N.. 2003. "Mechanical harvesting reduces sphacelia/sclerote levels of claviceps africana." International Sorghum and Millets Newsletter.
Assessing various techniques to monitor yield in sugarcane
Jensen, T. A., Fokkema, B. and Baillie, C.. 2011. "Assessing various techniques to monitor yield in sugarcane ." Banhazi, T., Saunders, C. and Hegarty, R. (ed.) SEAg 2011: Diverse Challenges, Innovative Solutions. Gold Coast, Australia 29 - 30 Sep 2011 Canberra, Australia.
The possibility of using polymers in agriculture milling equipment
Al-Sandooq, J. M., Yousif, B. F. and Jensen, T. A.. 2011. "The possibility of using polymers in agriculture milling equipment." Banhazi, T., Saunders, C. and Hegarty, R. (ed.) SEAg 2011: Diverse Challenges, Innovative Solutions. Gold Coast, Australia 29 - 30 Sep 2011 Canberra, Australia.
Harvesting, processing and marketing Australian native grass seeds
Loch, D. S., Johnston, P. W., Jensen, troy and Harvey, G. L.. 1996. "Harvesting, processing and marketing Australian native grass seeds." New Zealand Journal of Agricultural Research. 39, pp. 591-599.
Drying rate and damage to navy beans
Radajewski, W., Jensen, T., Abawi, G. Y. and McGahan, E. J.. 1992. "Drying rate and damage to navy beans." Transactions of the ASABE. 35 (2), pp. 583-590.
Assessment of sugarcane yield monitoring technology for precision agriculture
Jensen, T., Baillie, C., Bramley, R., Di Bella, L., Whiteing, C. and Davis, R.. 2010. "Assessment of sugarcane yield monitoring technology for precision agriculture." Bruce, R. C. (ed.) 32nd Annual Conference of the Australian Society of Sugar Cane Technologists (ASSCT 2010). Bundaberg, Australia 11 - 14 May 2010 Brisbane, Australia.
Relating satellite imagery with grain protein content
Basnet, Badri Bahadur, Apan, Armando, Kelly, Rob, Jensen, Troy, Strong, Wayne and Butler, David. 2003. "Relating satellite imagery with grain protein content." 2003 Spatial Sciences Institute Biennial Conference: Spatial Knowledge Without Boundaries (SSC2003). Canberra, Australia 22 - 27 Sep 2003 Canberra, Australia.
Real-time protein monitoring - Australian experiences
Jensen, T., Zeller, L., Fox, G., Town, W. and Kelly, R.. 2005. "Real-time protein monitoring - Australian experiences." Stafford, John V. (ed.) 5th European Conference on Precision Agriculture. Uppsala, Sweden 09 - 12 Jun 2005 Wageningen, The Netherlands.
Grain crop attributes detected using digital imagery acquired from a low-altitude helium balloon
Jensen, T., Apan, A., Young, F. and Zeller, L.. 2005. "Grain crop attributes detected using digital imagery acquired from a low-altitude helium balloon." Stafford, John V. (ed.) 5th European Conference on Precision Agriculture. Uppsala, Sweden 09 - 12 Jun 2005 Wageningen, The Netherlands.
Use of airborne hyperspectral imagery to determine quality of sorghum crops
Wells, Natasha, Kelly, Rob, Phinn, Stuart, Apan, Armando, Jensen, Troy, Cooper, John and Strong, Wayne. 2004. "Use of airborne hyperspectral imagery to determine quality of sorghum crops." 12th Australasian Remote Sensing and Photogrammetry Conference (ARSPC 2004): To Measure is to Manage. Fremantle, Australia 18 - 22 Oct 2004 Adelaide, South Australia.
Evaluation of a proximal vision data acquisition system for measuring spatial variability in lettuce growth
Hussain, Amjed, Raine, Steven R., Henderson, Craig and Jensen, Troy. 2008. "Evaluation of a proximal vision data acquisition system for measuring spatial variability in lettuce growth." Unkovich, M. (ed.) 14th Australian Agronomy Conference: Global Issues. Paddock Action. Adelaide, Australia 21 - 25 Sep 2008 Gosford, NSW, Australia.
Application of probability analysis to assess nitrogen supply to grain crops in Northern Australia
Kelly, R. M., Strong, W. M., Jensen, T. A. and Butler, D.. 2004. "Application of probability analysis to assess nitrogen supply to grain crops in Northern Australia." Precision Agriculture. 5 (2), pp. 95-110. https://doi.org/10.1023/B:PRAG.0000022356.01537.67
Crop maturity mapping using a low-cost low-altitude remote sensing system
Jensen, Troy, Apan, Armando and Zeller, Les. 2009. "Crop maturity mapping using a low-cost low-altitude remote sensing system." Ostendorf, Bertram, Baldock, Penny, Bruce, David, Burdett, Michael and Corcoran, Paul (ed.) 2009 Surveying and Spatial Sciences Institute Biennial International Conference (SSC 2009): Spatial Diversity. Adelaide, Australia 28 Sep - 02 Oct 2009 Adelaide, Australia.
The use of a UAV as a remote sensing platform in agriculture
Jensen, Troy, Apan, Armando and Zeller, Leslie. 2009. "The use of a UAV as a remote sensing platform in agriculture." Banhazi, T. M. and Saunders, C. (ed.) SEAg 2009: Agricultural Technologies In a Changing Climate. Brisbane, Australia 13 - 16 Sep 2009 Brisbane, Australia.
Detecting the attributes of a wheat crop using digital 3D imagery acquired from a low-altitude platform
Jensen, T., Apan, A., Young, F. and Zeller, L.. 2007. "Detecting the attributes of a wheat crop using digital 3D imagery acquired from a low-altitude platform." Computers and Electronics in Agriculture. 59 (1-2), pp. 66-77. https://doi.org/10.1016/j.compag.2007.05.004
Assessing grain crop attributes using digital imagery acquired from a low-altitude remote controlled aircraft
Jensen, Troy, Apan, Armando, Young, Frank R., Zeller, Leslie Charles and Cleminson, Ken. 2003. "Assessing grain crop attributes using digital imagery acquired from a low-altitude remote controlled aircraft." 2003 Spatial Sciences Institute Biennial Conference: Spatial Knowledge Without Boundaries (SSC2003). Canberra, Australia 22 - 27 Sep 2003 Canberra, Australia.