Picture of                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     Rex Newkirk

Rex Newkirk Associate Professor, Ministry of Agriculture Endowed Research Chair Feed Processing Technology

6D20 - Agriculture Building

Research Area(s)

  • Grain sorting; ingredient processing
  • By-product utilization


Animal and Poultry Science

Research Interests

Area of Feed Processing Technology including:

  • Ingredient processing to enhance value and feeding value and consistency
  • Processing to increase nutritional value of by-products such as Canola meal, DDGS and other byproducts of biofuel production including BioChar
  • Seed sorting to remove downgrading factors such as fusarium from wheat and barley
  • The use of novel technologies such as Screw Extruder Steam Explosion to add value to high fibre ingredients
  • Removal of Anti-nuitritional factors through processing


Ph.D., Animal and Poultry Science, University of Saskatchewan 2002
M.Sc., Animal and Poultry Science, University of Saskatchewan 1996
B.Sc., Animal and Poultry Science, University of Saskatchewan 1992

Selected Recent Publications

B. A Magnuson, C.A. Patterson, P. Hucl, R.W. Newkirk, and H.L. Classen, 2014.  Safety assessment of consumption of glabrous canary seed (Phalaris canariensis L.) in rats.  Food Chem. Toxicol. 63:91-103.

R.W. Seneviratne, E. Beltrana, R.W. Newkirk, L.A. Goonewardene, and R.T. Zijlstra, 2011.  Processing conditions affect nutrient digestibility of cold-pressed canola cake for grower pigs.  J. Animal Sci. 89:2452-2461.

R.W. Newkirk, J.I. Ram, P. Hucl, C.A. Paterson and H.L. Classen, 2011.  A study of nutrient digestibility and growth performance of broiler chicks fed hairy and hairless canary seed (Phalaris canariensis L.) products.  Poult. Sci. 90:2782-2789.

R.W. Seneviratne, M.G. Young,E. Beltranena, L.A. Goonewardene, R.W.Newkirk, and R.T. Zijlstra 2010. The nutritional value of expeller-pressed canola meal for grower-finisher pigs. J. Animal Sci. 88:2073-2083.

P.A. Thacker and R.W. Newkirk, 2005.  Performance of growing-finishing pigs fed barley-based diets containing toasted or non-toasted canola meal.  Can. J. Animal Sci. 85:53-59.

D.L. Thiesen, D.D. Maenz, R.W. Newkirk, H.L. Classen and M.D. Drew., 2004. Replacement of fishmeal by canola protein concentrate in diets fed to rainbow trout (Oncorhynchus mykiss).  Aqua. Nutr. 10: 379-388.

R.W. Newkirk, H.L. Classen, T.A. Scott and M.J. Edney, 2003.  The Availability and Content of Amino Acids in Toasted and Non-toasted Canola Meals.  Can. J. Anim. Sci. 83:131-139.

R.W. Newkirk, H.L. Classen and M.J. Edney, 2003.  Effects of Prepress-solvent Extraction on the Nutritional Value of Canola Meal for Broiler Chickens. Anim. Feed Sci. Tech. 104:111-119.