Jon Wraith

Professor of Soil and Environmental Physics
Phone: (603) 862-2468
Office: COLSA Dean's Office, Rudman Hall Rm G15D, Durham, NH 03824
Jon Wraith - Dean of COLSA

As dean, responsible for the administration of the college's academic programs, as well as for promoting the research and outreach efforts of the faculty. Oversee day to day operations of the NHAES, including funded research activities and our farms/dairies/greenhouse facilities.


  • Ph.D., Soil Science & Biometeorology, Utah State University
  • M.S., Range Science, Utah State University
  • B.S., Range Management, Humboldt State University
  • A.A., LiberalArtSciGenStdyHumanities, Butte Community College

Selected Publications

Miller, P. R., Lighthiser, E. J., Jones, C. A., Holmes, J. A., Rick, T. L., & Wraith, J. M. (2011). Pea green manure management affects organic winter wheat yield and quality in semiarid Montana. Canadian Journal of Plant Science, 91(3), 497-508. doi:10.4141/cjps10109

Or, D., Smets, B. F., Wraith, J. M., Dechesne, A., & Friedman, S. P. (2007). Physical constraints affecting bacterial habitats and activity in unsaturated porous media – a review. Advances in Water Resources, 30(6-7), 1505-1527. doi:10.1016/j.advwatres.2006.05.025

Hill, J. P., Germino, M. J., Wraith, J. M., Olson, B. E., & Swan, M. B. (2006). Advantages in Water Relations Contribute to Greater Photosynthesis in Centaurea maculosa Compared with Established Grasses. International Journal of Plant Sciences, 167(2), 269-277. doi:10.1086/499505

Persson, M., Wraith, J. M., & Dahlin, T. (2006). A Small-Scale Matric Potential Sensor Based on Time Domain Reflectometry. Soil Science Society of America Journal, 70(2), 533. doi:10.2136/sssaj2005.0209n

Castiglione, P., Shouse, P. J., & Wraith, J. M. (2006). Multiplexer-Induced Interference on TDR Measurements of Electrical Conductivity. Soil Science Society of America Journal, 70(5), 1453. doi:10.2136/sssaj2005.0169

Robinson, D. A., Jones, S. B., Wraith, J. M., Or, D., & Friedman, S. P. (2003). A Review of Advances in Dielectric and Electrical Conductivity Measurement in Soils Using Time Domain Reflectometry. VADOSE ZONE JOURNAL, 2(4), 444-475. Retrieved from

Jones, S. B., Wraith, J. M., & Or, D. (2002). Time domain reflectometry measurement principles and applications. Hydrological Processes, 16(1), 141-153. doi:10.1002/hyp.513

Sivamani, E., Bahieldin, A., Wraith, J. M., Al-Niemi, T., Dyer, W. E., Ho, T. -H. D., & Qu, R. (2000). Improved biomass productivity and water use efficiency under water deficit conditions in transgenic wheat constitutively expressing the barley HVA1 gene. Plant Science, 155(1), 1-9. doi:10.1016/s0168-9452(99)00247-2

Or, D., & Wraith, J. M. (1999). Temperature effects on soil bulk dielectric permittivity measured by time domain reflectometry: A physical model. Water Resources Research, 35(2), 371-383. doi:10.1029/1998wr900008

Wraith, J. M., & Or, D. (1999). Temperature effects on soil bulk dielectric permittivity measured by time domain reflectometry: Experimental evidence and hypothesis development. Water Resources Research, 35(2), 361-369. doi:10.1029/1998wr900006

Most Cited Publications