Jude Liu, Ph.D.

Jude Liu, Ph.D.

  • Associate Professor of Agricultural and Biological Engineering
  • Machinery and Biomass Logistics
  • Program contact for Agricultural Systems Management Minor; Off-Road Equipment Minor
436 Shortlidge RD
Agricultural Engineering Building, Rm. 218

University Park, PA 16802

Areas of Expertise

  • Agricultural Machinery
  • Machine design and test
  • Biomass harvesting, handling and logistics
  • Biomass in-field processing and densification
  • Hydraulics and Pneumatic system design and test


  • Ph.D. in Biosystems Engineering, University of Manitoba, Canada
  • B.S., M.S., Ph.D. in Automotive Engineering, Jilin University, China


  • ASM 310 - Power Transmission in Agriculture
  • B E 461 - Design of Fluid Power Systems
  • B E 306 - Machines for Agricultural and Biological Processing
  • ASM 420 - Principles of Off-Road Machines
  • ABE 885 - Biomass Harvesting and Logistics

For information about courses please visit the LionPATH Course Catalog.

Research Interests

Machine Systems for Biomass and Specialty Crops

Machine Systems for Biomass Harvesting and Processing 

Dr. Liu's research in this area focuses on (1) testing mechanical properties of dedicated energy crops; (2) studying field efficiency and capacity of different machine systems for biomass feedstocks harvesting and processing; and (3) modeling biomass feedstocks logistics systems.

Machinery for Specialty Crop Production 

The cultivation and harvest of specialty crops for the fresh fruit market are labor intensive. Dr. Liu's research activities in this area include innovative technologies and equipment development for: (1) mechanical fruit thinning; and (2) mechanical harvest-assist systems of specialty crops.

Off-Road Equipment

Agricultural production related off-road equipment is another area of interest. Dr. Liu's interested topics include: soil compaction and relevant environmental issues, tillage and soil and water conservation, power performance, tractive efficiency and fuel consumption of off-road power units. 

Membership And Certification In Professional Societies

  • Professional Engineer, Registered in Saskatchewan, Canada
  • Certification in Higher Education Teaching, University of Manitoba, Canada
  • Member, American Society of Agricultural and Biological Engineers (since 2000)
  • Member, SAE International
  • Member, International Fluid Power Society

ASABE Conference Papers by Searching Author Jude Liu


Harvesting technologies and costs for switchgrass production
Advances in Bioscience and Biotechnology, Toth, Hana, Liu, Jude, 2024

Journal of the ASABE, Hofstetter, Daniel W., Liu, Jude, 2024

Case Study: Modeling a Grain Bin for Safe Entry Retrofit †
Safety, Dyer, Michael, Gorucu, Serap, Bock, Randall, Thomas, Roderick, Liu, Jude, Fetzer, Linda, 2023

The Effect of Mechanical Conditioning on Physical Conditions of Miscanthus Plants
American Journal of Plant Science, Redcay, Sebastian, Liu, Jude, 2023

Applied Engineering in Agriculture, Chahal, Azadwinder, Ciolkosz, Daniel E., Puri, Virendra, Liu, Jude, Jacobson, Michael Gregory, 2023

Modeling and Dynamics Analysis on Pseudo-Rigid-Body for the Swing Vibrator of the Caudal-Fin-Like Valve-Less Pump
International Journal of Acoustics and Vibrations, Hu, Xiaoqi, Hu, Caiqi, Du, Hui, Liu, Jude, 2022

Mechanical characteristics of wood-bark interface of shrub willow
Industrial Crops and Products, Chahal, Azadwinder, Ciolkosz, Daniel, Puri, V, Jacobson, Michael, Liu, Jude, 2021

Lab scale studies of miscanthus mechanical conditioning and bale compression
Biosystems Engineering, Fasick, Gregory T., Liu, Jude, 2020

Factors affecting wood-bark adhesion for debarking of shrub willow
Biosystems Engineering, Chahal, Azadwinder, Ciolkosz, Daniel, Virendra, p, Puri, V, Liu, Jude, Jacobson, Michael, 2020

Distinct Signatures of Electron-Phonon Coupling Observed in the Lattice Thermal Conductivity of NbSe 3 Nanowires
Nano Letters, Yang, L., Tao, Y., Liu, J., Liu, C., Zhang, Q., Akter, M., Zhao, Y., Xu, T.T., Xu, Y., Mao, Z., Chen, Y., Li, D., 2019

Angle-dependent magnetoresistance as a sensitive probe of the charge density wave in quasi-one-dimensional semimetal Ta 2 NiSe 7
Applied Physics Letters, He, J., Wen, L., Wu, Y., Liu, J., Tang, G., Yang, Y., Xing, H., Mao, Z., Sun, H., Liu, Y., 2018

Effects of combined pretreatment with rod-milled and torrefaction on physicochemical and fuel characteristics of wheat straw
Agricultural Wastes, Bai, Xiaopeng, Wang, Guanghui, Sun, Yue, Yu, Yan, Liu, Jude, Wang, Decheng, Wang, Zhiqin, 2018

Combined different dehydration pretreatments and torrefaction to upgrade fuel properties of hybrid pennisetum (Pennisetum americanum ×P. purpureum)
Agricultural Wastes, Yu, Yan, Wang, Guanghui, Bai, Xiaopeng, Liu, Jude, Wang, Decheng, Wang, Zhiqin, 2018

Effects of roll and flail conditioning systems on mowing and baling of Miscanthus × giganteus feedstock
Biosystems Engineering, Redcay, Sebastian, Koirala, Anil, Liu, Jude, 2018

A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6
Chinese Physics Letters, Liu, J., Savici, A.T., Granroth, G.E., Habicht, K., Qiu, Y., Hu, J., Mao, Z.Q., Bao, W., 2018

Signature of quantum Griffiths singularity state in a layered quasi-one-dimensional superconductor
Nature Communications, Zhang, E., Zhi, J., Zou, Y.-C., Ye, Z., Ai, L., Shi, J., Huang, C., Liu, S., Lin, Z., Zheng, X., Kang, N., Xu, H., Wang, W., He, L., Zou, J., Liu, J., Mao, Z., Xiu, F., 2018

Electron mass enhancement and magnetic phase separation near the Mott transition in double-layer ruthenates
Frontiers of Physics, Peng, J., Gu, X.M., Zhou, G.T., Wang, W., Liu, J.Y., Wang, Y., Mao, Z.Q., Wu, X.S., Dong, S., 2018

Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2
Physical Review B-Condensed Matter, Weber, C.P., Masten, M.G., Ogloza, T.C., Berggren, B.S., Man, M.K.L., Dani, K.M., Liu, J., Mao, Z., Klug, D.D., Adeleke, A.A., Yao, Y., 2018

Energy Consumption of Herbaceous Biomass Bulk Densification
Innovative Energy & Research, Liu, Jude, Wang, Tianyi, 2017

The development of mechanical apple harvesting technology: A review
Transactions of the ASABE, Zhang, Zhao, Heinemann, Paul, Liu, Jude, Schupp, James, Baugher, Tara, 2016

Dynamics Analysis on Piezoelectric Laminated Vibrator and Optimization of PZT Position
Shock and Vibration, Hu, Caiqi, Hu, Xiaoqi, Ji, Jing, Liu, Jude, Li, Shengduo, 2016

Straight vegetable oil as a replacement fuel for diesel: Comparing tractor performance in stationary and field tests
Transactions of the ASABE, Julius, C., Heinemann, P. H., Schaufler, D. H., Roth, G. W., Liu, J., Boehman, A. L., 2016

Design and field test of a low-cost apple harvest-assist unit
Transactions of the ASABE, Zhang, Z., Heinemann, P. H., Liu, J., Schupp, J. R., Baugher, T. A., 2016

Analysis of flow field and pumping performance for a valveless piezoelectric pump with a hemisphere-segment group
Strojniski Vestnik/Journal of Mechanical Engineering, Hu, Caiqi, Ji, Jing, Hu, Xiaoqi, Liu, Jude, Li, Shengduo, 2015

Development of a selective automated blossom thinning system for peaches
Transactions of the ASABE, Lyons, D. J., Heinemann, P. H., Schupp, J. R., Baugher, T. A., Liu, J., 2015

Design, fabrication, and testing of a low-cost apple harvest-assist device, Zhang, Zhao, Heinemann, Paul, Liu, Jude, Schupp, James, Baugher, Tara, 2014

Energy consumption of biomass bulk densification, Wang, Tianyi, Liu, Jude, 2014

Investigation of the densification performance of straw under different material surface, Wang, Tianyi, Wang, Guanghui, Wang, Decheng, Liu, Jude, 2014