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Hongyoung  Jeon    RES AGRI ENGR /ARSUserFiles/55623/Jeon.jpg **Hongyoung Jeon, Ph.D.** Application Technology Research Unit 1680 Madison Ave., Wooster, Ohio 44691 (330) 641-2996  My research interest is to utilize sensors and instruments to data-based optimization for production input during agricultural productions to maximize its effectiveness while minimizing its impact to the environment. My current research is stereo vision based variable rate sprayer for specialty crops which make spray decisions after analyzing image data from the stereo vision in real time. A prototype sprayer has developed, and my current focus is to develop algorithms to translate data to knowledge for crop protection product applications. My other research interest is to improve the deposition of crop protection product tank mix on intended targets after spray droplets are discharged from the nozzles to reduce active ingredient uses. Current focus in this research area is to develop a novel technique to high throughput measurements of the spray deposition to analyze the impact of a various ingredients of crop protection products in the deposition. ‪Hongyoung Jeon‬ - ‪Google Scholar‬  **Research Highlight Videos**  **Research Interest** Machine vision applications.
Variable rate applications.
Pesticide applications.
Instrument and sensors.
Agricultural robots/Automations.  **Research Experience:** 2020–Present
USDA- ARS Application Technology Research Unit as a research agricultural engineer.2011 - 2020
Dow AgroSciences/Corteva Agriscience as a senior application engineer.2008 - 2011
USDA- ARS Application Technology Research Unit as a post-doc research agricultural engineer  **Education:** 2000
Bachelor of Engineering in Agricultural Machinery Engineering, Chungbuk National University2003
Master of Science in Biosystems Engineering, the University of Tennessee at Knoxville2008
Doctor of Philosophy in Agricultural Engineering, the University of Illinois at Urbana-  Champaign.  Publications(Clicking on the reprint iconReprint Icon  will take you to the publication reprint.)Development of an electric variable air assist system for apple orchard sprayers-(Peer Reviewed Journal)Stereo vision controlled variable rate sprayer for specialty crops: Part III. Effects of travel speeds on spray deposition and ground loss-(Peer Reviewed Journal) Roman, C., Jeon, H., Zhu, H., Ozkan, E., Campos, J. 2023. Stereo vision controlled variable rate sprayer for specialty crops: Part III. Effects of travel speeds on spray deposition and ground loss. Journal of the ASABE. 66(6):1469-1479. https://doi.org/10.13031/ja.15699.Review: The risks of spray adjuvants to honey bees-(Review Article) Shannon, B., Jeon, H., Johnson, R. 2023. Review: The risks of spray adjuvants to honey bees. Journal of Insect Science. https://doi.org/10.1093/jisesa/iead100.Air-pinch PWM valve to regulate flow rate of hollow-cone nozzles for variable-rate sprayers-(Peer Reviewed Journal)Wind tunnels and their uses to study variables affecting precision applications of agricultural sprays-(Review Article) Womac, A., Ozkan, E., Zhu, H., Kochendorfer, J., Jeon, H., Nataraj, E. 2023. Wind tunnels and their uses to study variables affecting precision applications of agricultural sprays. Journal of the ASABE. 66(5):1135-1151. https://doi.org/10.13031/ja.15622.Stereo vision controlled variable rate sprayer for specialty crops: Part II. Sprayer development and performance evaluation-(Peer Reviewed Journal) Roman, C., Jeon, H., Zhu, H., Campos, J., Ozkan, E. 2023. Stereo vision controlled variable rate sprayer for specialty crops: Part II. Sprayer development and performance evaluation. Journal of the ASABE. 66(5): 1005-1017. https://doi.org/10.13031/ja.15578.Evaluating kaolin clay as a potential substance for ISO sprayer cleaning system tests-(Peer Reviewed Journal) Roman, C., Jeon, H., Zhu, H., Ozkan, E. 2023. Evaluating kaolin clay as a potential substance for ISO sprayer cleaning system tests. Applied Engineering in Agriculture. 39(3):347-358. https://doi.org/10.13031/aea.15466.Assessment of PWM solenoid valves to manipulate hollow-cone nozzles with different modulation frequencies-(Peer Reviewed Journal) Campos, J., Zhu, H., Jeon, H., Salcedo, R., Ozkan, E., Gil, E. 2023. Assessment of PWM solenoid valves to manipulate hollow-cone nozzles with different modulation frequencies. Applied Engineering in Agriculture. 39(2): 235-244. https://doi.org/10.13031/aea.15415.Investigation of depth camera potentials for variable-rate sprayers-(Peer Reviewed Journal) Jeon, H., Zhu, H. 2023. Investigation of depth camera potentials for variable-rate sprayers. American Society of Agricultural and Biological Engineers. 66(1):115-126. https://doi.org/10.13031/ja.15070.Comprehension of PWM solenoid valves to control hollow-cone nozzles for precision variable-rate orchard sprayers-(Proceedings) Zhu, H., Salcedo, R., Jeon, H., Ozkan, E., Gil, E., Campos, J., Romain, C. 2022. Comprehension of PWM solenoid valves to control hollow-cone nozzles for precision variable-rate orchard sprayers. In: SIMA Agritech Day 5th Edition, November 5, 2022, Paris, France. p.291-304..A turbidity module to measure spray mixture concentration for premixing in-line injection system-(Peer Reviewed Journal) Zhang, Z., Zhu, H., Jeon, H., Ozkan, E., Wei, Z., Salcedo, R. 2023. A turbidity module to measure spray mixture concentration for premixing in-line injection system. Applied Engineering in Agriculture. 39(1):13-21. https://doi.org/10.13031/aea.15245.Stereo vision controlled variable rate sprayer for specialty crops: part I. Controller development-(Peer Reviewed Journal) Jeon, H., Zhu, H. 2022. Stereo vision controlled variable rate sprayer for specialty crops: part I. Controller development. Journal of the ASABE. 65(6):1397-1410. https://doi.org/10/13031/ja.15227.Evaluation of a stereo vision as a canopy detection sensor for variable rate specialty crop sprayers-(Proceedings) Jeon, H., Zhu, H., Roman, C., Campos, J., Salcedo, R., Ozkan, E. 2022. Evaluation of a stereo vision as a canopy detection sensor for variable rate specialty crop sprayers. Symposium Proceedings. SIMA Agritech Day 5th Edition, November 5, 2022, Paris, France. p. 317-328.Droplet size classifications for hollow-cone nozzles manipulated with two different PWM valves-(Proceedings) Salcedo, R., Zhu, H., Jeon, H., Campos, J., Roman, C., Ozkan, E., Wei, Z., Gil, E. 2022. Droplet size classifications for hollow-cone nozzles manipulated with two different PWM valves. ASABE Annual International Meeting. Paper No. 2200272.Evaluation of of PWM solenoid valves to manipulate hollow cone nozzles operated at high pressures and frequencies-(Proceedings) Campos, J., Zhu, H., Jeon, H., Ozkan, E., Salcedo, R. 2022. Evaluation of of PWM solenoid valves to manipulate hollow cone nozzles operated at high pressures and frequencies. ASABE Annual International Meeting. Paper No. 2200396.Status of spray penetration and deposition in dense field crop canopies-(Peer Reviewed Journal) Womac, A., Ozkan, E., Zhu, H., Kochendorfer, J., Jeon, H. 2022. Status of spray penetration and deposition in dense field crop canopies. American Society of Agricultural and Biological Engineers. 65(5):1107-1117. https://doi.org/10.13031/ja.15091.Droplet size distributions from hollow-cone nozzles coupled with PWM valves-(Peer Reviewed Journal) Salcedo, R., Zhu, H., Jeon, H., Ozkan, E., Wei, Z., Gil, E., Campos, J., Roman, C. 2022. Droplet size distributions from hollow-cone nozzles coupled with PWM valves. American Society of Agricultural and Biological Engineers. 65(4):695-706. https://doi.org/10.13031/ja.15064.Characterisation of activation pressure, flowrate and spray angle for hollow-cone nozzles controlled by pulse width modulation-(Peer Reviewed Journal) Salcedo, R., Zhu, H., Jeon, H., Ozkan, E., Wei, Z., Gil, E. 2022. Characterisation of activation pressure, flowrate and spray angle for hollow-cone nozzles controlled by pulse width modulation. Biosystems Engineering. 218:139-152. https://doi.org/10.1016/j.biosystemseng.2022.04.002.Foliar deposition and off-target loss in young apple orchard with PWM-controlled spray systems-(Peer Reviewed Journal) Zhu, H., Ozkan, E., Salcedo, R., Jeon, H., Flachieri, D. 2022. Foliar deposition and off-target loss in young apple orchard with PWM-controlled spray systems. Aspects of Applied Biology. 147:149-155.Low-cost microcontroller-based device to measure kaolin clay concentrations for iso sprayer cleanout tests-(Peer Reviewed Journal) Jeon, H., Zhu, H. 2022. Low-cost microcontroller-based device to measure kaolin clay concentrations for iso sprayer cleanout tests. Applied Engineering in Agriculture. 38(1): 135-143. https://doi.org/10.13031/aea.14764.Retention and spread capability of impacted droplets with surfactant and hydrocolloid based adjuvants-(Peer Reviewed Journal) Abbott, J.R., Zhu, H., Jeon, H. 2021. Retention and spread capability of impacted droplets with surfactant and hydrocolloid based adjuvants. Journal of the ASABE. 64(6):1883-1894. https://doi.org/10.13031/trans.14461.Development of variable-rate precision spraying systems for tree crop production-(Proceedings) Zhu, H., Chen, Y., Lu, H., Shen, Y., Jeon, H., Gu, J., 0zkan, E., Derksen, R.C., Reding, M.E., Ranger, C.M., Canas, L., Krause, C.R., Locke, J.C., Ernst, S., Zondag, R., Fulcher, A., Rosetta, R. 2013. Development of variable-rate precision spraying systems for tree crop production. Workshop Proceedings. 12th Workshop on Spray Application Techniques in Fruit Growing (Suprofruit 2013), June 26-28, 2013, Valencia, Spain. p. 123-125.Droplet size distributions of adjuvant-amended sprays from an air-assisted five-port PWM nozzle-(Peer Reviewed Journal) Gu, J., Zhu, H., Ding, W., Jeon, H. 2011. Droplet size distributions of adjuvant-amended sprays from an air-assisted five-port PWM nozzle. Atomization and Sprays. 21(3):263-274.Development of variable-rate sprayer for nursery liner applications-(Peer Reviewed Journal) Jeon, H., Zhu, H. 2012. Development of variable-rate sprayer for nursery liner applications. Transactions of the ASABE. 55(1):303-312.Performance evaluation of a newly developed variable rate sprayer for nursery liner applications-(Peer Reviewed Journal) Jeon, H., Zhu, H., Derksen, R.C., Ozkan, E., Krause, C.R. 2012. Performance evaluation of a newly developed variable rate sprayer for nursery liner applications. Transactions of the ASABE. 54(6):1997-2007.Spray droplet sizes with additives discharged from an air-assisted variable-rate nozzle-(Proceedings) Gu, J., Zhu, H., Ding, W., Jeon, H. 2011. Spray droplet sizes with additives discharged from an air-assisted variable-rate nozzle. ASABE Annual International Meeting. Paper No. 1110542. http://asae.frymulti.com/azdez.asp?search=1&JID=5&AID=37221&CID=loui2011&T=1.Development of an experimental variable-rate sprayer for nursery liner applications-(Proceedings) Jeon, H., Zhu, H., Derksen, R.C., Ozkan, E., Krause, C.R. 2011. Development of an experimental variable-rate sprayer for nursery liner applications. ASABE Annual International Meeting. Paper No. 1110537. http://asae.frymulti.com/azdez.asp?search=1&JID=5&AID=37217&CID=loui2011&T=1.Verification of a variable rate sprayer for nursery liner applications-(Proceedings) Jeon, H., Zhu, H., Derksen, R.C., Ozkan, E., Krause, C.R. 2011. Verification of a variable rate sprayer for nursery liner applications. ASABE Annual International Meeting, 8/7-10/11, Louisville, Kentucky. Paper No. 1110497.Robust crop and weed segmentation under uncontrolled outdoor illumination-(Peer Reviewed Journal) Jeon, H., Tian, L.F., Zhu, H. 2011. Robust crop and weed segmentation under uncontrolled outdoor illumination. Sensors. 11(6)6270-6283.Development of Two Intelligent Spray Systems for Ornamental Nurseries-(Proceedings) Zhu, H., Jeon, H., Chen, Y., Gu, J., Ozkan, H., Derksen, R.C., Reding, M.E., Ranger, C.M., Canas, L., Krause, C.R., Locke, J.C., Zondag, R.H., Ernst, S.C., Fulcher, A., Rosetta, R. 2012. Development of Two Intelligent Spray Systems for Ornamental Nurseries. International Plant Propagators Proceedings. 60:41-46.Evaluation of ultrasonic sensor for variable rate spray applications-(Peer Reviewed Journal) Jeon, H., Zhu, H., Derksen, R.C., Ozkan, H., Krause, C.R. 2011. Evaluation of ultrasonic sensor for variable rate spray applications. Computers and Electronics in Agriculture. 75(1):213-221. https://doi.org/10.1016/j.compag.2010.11.007.Laboratory and Field Tests of Ultrasonic Sensors for Precision Sprayers-(Proceedings) Jeon, H.Y., Zhu, H., Derksen, R.C., Ozkan, H.E., Krause, C.R. 2010. Laboratory and Field Tests of Ultrasonic Sensors for Precision Sprayers. American Society of Agricultural and Biological Engineers International Meeting, June 20-23, 2010, Pittsburgh, Pennsylvania. ASABE Paper # 1008804.A Real-time Variable-Rate Sprayer for Nursery Liner Applications-(Proceedings) Jeon, H.Y., Zhu, H., Derksen, R.C., Ozkan, H.E., Krause, C.R. 2010. A Real-time Variable-Rate Sprayer for Nursery Liner Applications. American Society of Agricultural and Biological Engineers International Meeting, June 20-23, 2010, Pittsburgh, Pennsylvania. ASABE Paper #1008801.
 ProjectsCoordinated Precision Application Technologies for Sustainable Pest Management and Crop ProtectionIn-House Appropriated (D)Accession Number:437778Technical Support for New Test Material of ISO sprayer Cleanout StandardReimbursable Cooperative Agreement (R)Accession Number:443498Investigating the Feasibility of Utilizing Stereo Vision Systems in Variable Rate Application Systems for Specialty CropsNon-Assistance Cooperative Agreement (S)Accession Number:445290Evaluating the Performance of a Variable Orchard Rate Sprayer with a Stereo Vision SystemNon-Assistance Cooperative Agreement (S)Accession Number:445295Improve Spray Droplet Retention Capabilities on Targets with Amendment of Spray Solution PropertiesNon-Assistance Cooperative Agreement (S)Accession Number:438488


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