Faculty Directory

Terry Siebenmorgen

Terry Siebenmorgen

Distinguished Professor, Rice Processing

(DREX)-Director Experiment Station

(FDSC)-Food Science

Phone: 479-575-4605

Download vcard


Visit Website

Research Emphasis: Rice Processing

Program Description
The Rice Processing Program (RPP) is a multidisciplinary, industry-interactive program serving the U.S. and global rice industry. Since its inception in 1993, the RPP has garnered broad-based financial, equipment, and in-kind support from national/ international companies and producer groups. RPP faculty conduct both basic and applied research, encompassing studies in pre-harvest property characterization, drying, storage, milling, and end-use quality assessment, with some projects conducted at field and company locations. The hallmark of the RPP is the Industry Alliance Meeting, held annually on the University of Arkansas campus to report program findings and provide a venue for open discussion of rice industry issues. The RPP Advisory Board, comprising members of sponsoring corporations, meets at least annually to direct Program activities and provide insight to RPP faculty on industry trends and challenges. 

Vision Statement
The University of Arkansas Rice Processing Program will be a premier source of basic and applied research pertaining to post-harvest processing of rice. This vision is to be realized through continued support and involvement of current U.S. and international corporate sponsors of the Program.

Primary Long-range Goal
A primary long-term goal is to develop improved rice drying systems that minimize milling and functional quality deterioration.

Ph.D.- University of Nebraska (Engineering)

M.S.- Purdue University (Agricultural Engineering)

B.S.- University of Arkansas (Agricultural Engineering)

Book Chapters (2015- present)

Prakash, B. and T.J. Siebenmorgen. 2019. Rice Drying. Chapter 4 in Advances in Science & Engineering of Rice. Z. Pan and R. Khir eds. DEStech Publications, Lancaster, PA, U.S.A.

Siebenmorgen, T.J. 2018. Chapter 14. Laboratory measurement of rice milling yield. In Rice Production Handbook, MP192. J. Hardke ed. Cooperative Extension Service, University of Arkansas.

Siebenmorgen, T.J., B. Grigg, P. Counce, and J. Hardke. 2018 Chapter 15. Production factors impacting rice milling yield. In Rice Production Handbook, MP192. J. Hardke ed, Cooperative Extension Service, University of Arkansas.

Hardke, J. and T.J. Siebenmorgen. 2018. Chapter 13. Rice Grades. In Rice Production Handbook, MP192. J. Hardke ed. Cooperative Extension Service, University of Arkansas.

Refereed Journal Articles (2015- present)

Odek, Z. R., & Siebenmorgen, T. J. 2019. Estimating Head Rice Yield of long-grain rice using a bending force instrument. Applied Engineering in Agriculture35(3), 319-323.

Shi, H., & Siebenmorgen, T. J. (2019). Effect of rice cultivar, type, form, and moisture content on the angle of repose. Applied Engineering in Agriculture 35(4): 361-368.

Mukhopadhyay, S., T.J. Siebenmorgen, and A. Mauromoustakos. 2019. Effect of tempering approach following cross-flow drying on rice milling yields. Drying Technology DOI:10.1080/07373937.2018.1564760.

Graham-Acquaah, S., T.J. Siebenmorgen, M.L. Reba, J.H. Massey, A. Mauromoustakos, A. Adviento-Borbe, R. January, R. Burgos and J. Baltz-Gray. 2019. Impact of alternative irrigation practices on rice quality. Cereal Chemistry. 96: 815-823.

Shi, H., T.J. Siebenmorgen, H. Luo, and Z. Odek. 2019. Fissure detection and measurement in rough rice using X-ray imaging. Trans. of the ASABE 62(4): 859-866.

Prakash, B., T.J. Siebenmorgen, K.E. Gibson, and S. Kumari. 2019. Effect of storage moisture content on milling characteristics of rough rice  Trans. of the ASABE 62(4):1011-1019.

Hampton, R.M., G.G. Atungulu, Z. Odek, V. Rolland, T.J. Siebenmorgen, S.A. Wilson and T. McKay. 2019. Assessment of Rhyzopertha dominica (F.) progeny and feeding damage on rice dried with infrared radiation. Journal of Stored Products Research 81: 69-75.

Prakash, B. and T.J. Siebenmorgen. 2018. Single parameter thin layer drying equations for long-grain rice. Trans. of the ASABE 61(2):  733-742. 

Prakash, B. and T.J. Siebenmorgen. 2018. Mathematical modeling of a cross-flow rice dryer with grain inverters. Trans. of the ASABE 61(5): 1757-1765.

Odek, Z., T.J. Siebenmorgen, and A. Mauromoustakos. 2018. Relative impact of kernel thickness and moisture content on rice fissuring during drying. Applied Engineering in Agriculture 34(1):239-246.

Sha, X., Moldenhauer, K.A.K., Gibbons, J.W., Hardke, J.T., Bulloch, J.M., Beaty, B.A., Norman, R.J., Wilson Jr., C.E., Wamishe, Y., Siebenmorgen, T.J., Berger, G.L., and Wisdom, D.K.A. 2018. Registration of ‘Titan’ Southern medium grain rice. Journal of Plant Registrations 12:48-51. doi:10.3198/jpr2017.04.0022crc.

Odek, Z., B. Prakash, and T.J. Siebenmorgen. 2017. X-ray detection of fissures in rough rice kernels. Applied Engineering in Agriculture 33(5): 721-728.

Mukhopadhyay, S. and T.J. Siebenmorgen. 2017. Drying Technology, DOI:10.1080/07373937.2017.1402024. p.1-16.

Mukhopadhyay, S. and T.J. Siebenmorgen. 2017. Glass transition effects on milling yields in a cross-flow drying column. Drying Technology, DOI:10.1080/07373937.2017.1351453.

Odek, Z., B. Prakash, and T.J. Siebenmorgen. 2017. X-Ray Detection of Fissures in Rough Rice Kernels. Applied Engineering in Agriculture 33(5): 721-728.

Prakash, B., S. Mukhopadhyay, and T.J. Siebenmorgen. 2017. Mathematical modeling of a cross-flow rice dryer. Trans. of the ASABE 60(3):999-1009.

Haydon, K.N. and T.J. Siebenmorgen. 2017. Impacts of delayed drying on discoloration and functionality of rice. Cereal Chemistry 94(4):683-692.

Mukhopadhyay, S. and T.J. Siebenmorgen. 2017. Physical and functional characteristics of broken rice kernels caused by moisture-adsorption fissuring.  Cereal Chemistry 94(3):539-545.

Grigg, B.C. and T.J. Siebenmorgen.  2017.  Predicting milling yields of long-grain rice using select physical parameters.  Applied Engineering in Agriculture 33(2):279-285.

Billiris, M.A., T. Thurow, and T.J. Siebenmorgen. 2016. Using thermogravimetric analysis to measure the drying rates of individual rice kernels. Applied Engineering in Agriculture 32(6):899-907. 

Grigg, B.C. and T.J. Siebenmorgen. 2016. Milling yields and physicochemical properties of long-grain rice thickness fractions. Applied Engineering in Agriculture 32(6):915-923.

Patindol, J.A., J.R. Jinn, Y.-J. Wang, and T.J. Siebenmorgen. 2016. Kernel and starch properties of U.S. and imported medium- and short-grain rice cultiva rs.Cereal Chemistry 93(6):529-535.

Grigg, B.C., T.J. Siebenmorgen, and R.J. Norman. 2016. Effects of nitrogen rate and harvest moisture content on physicochemical properties and milling yields of rice. Cereal Chemistry 93(2):172-181.

Rodreguez-Arzuaga, M., S. Cho, M.A. Billiris, T.J. Siebenmorgen, and H.Seo. 2016. Impacts of degree of milling on the appearance and aroma characteristics of raw rice. J Sci Food Agric 96:3017–3022.

Rogers, C.W., R.J. Norman, T.J. Siebenmorgen, B.C. Grigg, J.T. Hardke, K.B. Brye, and E. Gbur. 2016. Rough rice and milling yields as affected by nitrogen, harvest moisture content, and cultivar. Agron. J. 108(2):813-821.

Lawrence, J., G.G. Atungulu, and T. J. Siebenmorgen. 2015. Modeling in-bin rice drying using natural air and controlled air drying strategies. Trans. of the ASABE 58(4):1103-1111.

Grigg, B.C. and T.J. Siebenmorgen. 2015. Impacts of kernel thickness and associated physical properties on milling yields of long-grain rice. Applied Engineering in Agriculture 31(3):505-511.

Counce, P.A., T.J. Siebenmorgen, and A.A. Ambardekar. 2015. Rice reproductive development stage thermal time and calendar day intervals for six US rice cultivars in the Grand Prairie, Arkansas, over 4 years. Annals of Applied Biology ISSN 0003-4746 (2015):1-15.

Patindol, J.A., T.J. Siebenmorgen, and Y.J. Wang. 2015. Impact of environmental factors on rice starch structure; A review. Starch 67:42-54. 

Basutkar, N., T.J. Siebenmorgen, Y.-J. Wang, and J.A. Patindol. 2015. Functional properties of co-mingled rice cultivar lots. Cereal Chemistry 92(1):114-119.

Distinguished Professor, University of Arkansas, Department of Food Science

University Professor, University of Arkansas, Department of Food Science

Director, University of Arkansas Rice Processing Program

Professor, University of Arkansas, Department of Food Science

Interim Department Head, University of Arkansas, Department of Food Science

Professor, University of Arkansas, Department of Biological & Agricultural Engineering

Interim Assistant Director, University of Arkansas, Agricultural Experiment Station

Associate Professor, University of Arkansas, Department of Biological & Agricultural Engineering

Assistant Professor, University of Arkansas, Department of Biological & Agricultural Engineering


  • Arkansas Agriculture Hall of Fame, Class XXXII


  • Distinguished Service Award, Rice Technical Working Group


  • Engineer of the Year, Arkansas Section of the ASABE


  • Distinguished Rice Research and Education Award, Rice Technical Working Group


  • Phil Williams Applied Research Award, American Assoc. of Cereal Chemists International
  • Fellow, American Association of Cereal Chemists International


  • Riceland Foods Inc. Friend of the Farmer


  • Distinguished Food Engineer Award, American Society of Agricultural and Biological Engineering/Food Processors Supply Association
  • John W. White Outstanding Research Award (Functional Foods Team)


  • Fellow, American Society of Agricultural and Biological Engineers
  • Inductee, Arkansas Academy of Biological and Agricultural Engineering


  • Spitze Land Grant University Faculty Award for Excellence
  • ASAE Transactions Superior Paper Award


  • John W. White Outstanding Research Team Award (Rice Processing Program)