College of Agriculture and Bioresources

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
  • M.Sc. (Animal and Poultry Science), University of Saskatchewan
  • B.Sc. (Animal and Poultry Science), University of Saskatchewan

Selected 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.