Iwaasa, Alan, Ph.D.

Research scientist - Grazing Management


Contact Information:

1 Airport Road
PO Box 1030
Swift Current, Saskatchewan S9H 3X2
Telephone: 306-770-4473
Fax: 306-770-4411
Email: alan.iwaasa@agr.gc.ca

Areas of Expertise:

  • Grazing management of native and tame grasslands
  • Forage quality characterization and benefit to beef production

Current Projects:

  • Measuring and assessing Canadian rangeland and other agricultural best management practices with the enhanced whole-farm model Holos
  • Best management practices for the re-introduction of sainfoin into existing alfalfa and grass pastures for Western Canada
  • Development of BMPs for cost-effective and successful establishment of saline forages for Saskatchewan
  • New forage legumes for sustainable summer pasture mixtures in Saskatchewan
  • Development of plant material (grasses, legumes) and mixtures for forage production in the Prairie region
  • Development of plant material (grasses, legumes) and mixtures for forage production in the Prairie region

Affiliations:

  • Adjunct Professor, University. of Saskatchewan, Saskatoon, SK
  • National Beef Research Strategy Workshop 2016 – Invited research participant
  • Member, American Society of Animal Science
  • Member, Society for Range Management
  • Saskatchewan Beef Industry Council – Committee Member

Research Publications:

The links below lead to abstracts with access to full text.

2016

2015

2014

2013

2012

2011

2009

Other Science Related Publications:

2015

  • Acharya, S.N., Berg, B., and Iwaasa, A.D. (2015). "Seeding sainfoin – best practices for successful stand establishment.", Sainfoin Training: Improving the profitability of livestock grazing systems with sainfoin, AAFC-Lethbridge, AB, July 21-22, 2015.
  • Acharya, S.N., Berg, B., and Iwaasa, A.D. (2015). "Training the trainers for testing the new sainfoin populations for mixed pasture.", Sainfoin Training: Improving the profitability of livestock grazing systems with sainfoin, AAFC-Lethbridge, AB, July 21-22, 2015.
  • Alemu, A.W., Little, S.M., Hao, X., Iwaasa, A.D., Baron, V.S., Chai, L.L., Janzen, H.H., Beauchemin, K.A., Thompson, D., and Kröbel, R. (2015). "Application of life cycle assessment approach to beef production systems in the Canadian prairies with regard to environmental impact and energy use efficiency.", LCA Conference XV - A bright green future, Vancouver, Canada, October 6-8, 2015, Presentation.
  • Huang, Q.Q., Hu, T.M., Jin, L., Acharya, S.N., McAllister, T.A., Iwaasa, A.D., Mchellenberg, M., and Wang, Y. (2015). "Effects of conservation method on condensed tannin content, ruminal and intestinal digestion characteristics of purple prairie clover.", Journal of Animal Science, 93(Suppl. S3), pp. 376. (Abstract)
  • Iwaasa, A.D. et al. (2015). Best management practices for the re-introduction of sainfoin into existing alfalfa and grass pastures for western Canada. Alberta Beef Producer and Alberta Livestock and Meat Agency Ltd. research proposal. Funding was approved for this research proposal for three years ending in 2018.
  • Iwaasa, A.D., Acharya, S.N., Coulman, B., Cade-Menun, B.J., and Sottie, E.T. (2015). "Bale grazing feeding strategies and alternative forages to consider for drier grazing environments.", BC Cattlemen’s Association – Maximizing our Forage Workshop and Field Day, Bar K Ranch, Prince George, BC, Canada, October 23, 2015.
  • Iwaasa, A.D., Acharya, S.N., and Sottie, E.T. (2015). "Effect of grazing sainfoin on longevity and production: the Swift Current experiences.", Sainfoin Training: Improving the profitability of livestock grazing systems with sainfoin, AAFC-Lethbridge, AB, July 21-22, 2015.
  • Iwaasa, A.D., Steppuhn, H., Wall, K., Acharya, S.N., and Sottie, E.T. (2015). "Pasture renovation options for enhancing productivity on saline and semiarid grasslands.", Saskatchewan Industry Beef Conference Forage and Grazing Symposium “Growing the Future”, Queensbury Convention Centre, Evraz Place,, Regina, SK, Canada, January 21-23, 2015.
  • Klabi, R., Terrence, B., Hamel, C., Iwaasa, A.D., and St-Arnaud, M. (2015). "Effet de la légumineuse Medicago sativa sur la diversité des champginons mycorhiziens à arbuscules et les rendements fourrager et azoté dans les prairies semi-arides.", Mycorrhizae 2015, Agriculture and Agri-Food Canada, Ottawa, Canada, May 8-9, 2015, pp. 10.
  • Klabi, R., Terrence, H.G., Hamel, C., Iwaasa, A.D., Schellenberg, M.P., Raies, A., and St-Arnaud, M. (2015). "Contribution of legumes ot the production of sustainable forage and plant nitrogen and to increase soil AM fungal diversity in grassland communities.", 8th International Conference on Mycorrhiza, Flagstaff, AZ, USA, August 3-7, 2015, pp. 31.
  • Sottie, E.T., Iwaasa, A.D., and Acharya, S.N. (2015). "Fitting sainfoin into the grazing system.", Sainfoin Training: Improving the profitability of livestock grazing systems with sainfoin, AAFC-Lethbridge, AB, July 21-22, 2015.

2014

  • Iwaasa, A.D. and Schellenberg, M.P. (2014). "Native and tame forage research opportunities at the Semiarid Prairie Research Centre (SPARC).", 2014 Native Prairie Restoration and Reclamation Workshop, Regina, SK, Canada, January 28-30, 2014.
  • Iwaasa, A.D., Baron, V.S., Lemke, R.L., Wang, H., Kröbel, R., Schellenberg, M.P., and McConkey, B.G. (2014). "AGGP Cropping System-Grassland Research and Extension: Semiarid Ecoregion.", AGGP cropping system – grassland research and extension: Semiarid Ecoregion, AAFC-Saskatoon, Saskatoon, Canada, March 20, 2014.
  • Iwaasa, A.D., Wang, Y., Muri, R., and Schellenberg, M.P. (2014). "AAFC-SPARC Forage, grazing, ecology evaluations of purple prairie clover (Dalea purpurea Vent.) and white prairie clover (D. candidia Michx. Ex Willd.).", 2014 Native Prairie Restoration and Reclamation Workshop, Regina, SK, Canada, January 28-30, 2014.

2013

  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., and Lardner, H.A. (2013). "The effect of in-field winter bale grazing on soil nutrients in pastures in Saskatchewan.", ASA/CSSA/SSSA International annual meeting, Tampa, Florida, USA, November 3-6, 2013.
  • Iwaasa, A.D., Li, Y., and Wang, Y. (2013). "Forage and grazing evaluations of purple prairie clover (Dalea purpurea Vent.) and white prairie clover (Dalea candida Michx. ex Willd) at AAFC-SPARC.", Intermountain native plant summit VII, Boise State University, March 26-27, 2013.

2012

  • Badea, A., Block, H.C., Iwaasa, A.D., McLeod, G.J., and Therrien, M.C. (2012). "An innovative approach in extended swath-grazing waxy forage barley.", 7th Canadian Barley Symposium, Calgary, AB, Canada, July 8-10, 2012, pp. 32. (Poster)
  • Iwaasa, A.D. and Schellenberg, M.P. (2012). "AAFC-SPARC long term grazing and forage production on re-established native grasslands in Southern Saskatchewan.", 2012 Native Prairie Restoration/Reclamation Workshop, TCU Place, Saskatoon, SK, Canada, February 8-9, 2012.
  • Iwaasa, A.D., Li, Y., Muri, R., Jin, Y., Schellenberg, M.P., and Biligetu, B. (2012). "Evaluation of the forage and seed characteristics of purple prairie clover (Dalea purpurea Vent.) and white prairie clover (Dalea candida Michx. Ex. Willd.).", 2012 Native Prairie Restoration/Reclamation Workshop, TCU Place, Saskatoon, SK, Canada, February 8-9, 2012. (Poster)
  • Iwaasa, A.D., McLeod, G.J., Schellenberg, M.P., Muri, R., and Biligetu, B. (2012). "Opportunities await for native and tame forage research at the Semiarid Prairie Agricultural Research Centre (SPARC) - Agriculture and Agri-Food Canada (AAFC).", 2012 Native Prairie Restoration/Reclamation Workshop, TCU Place, Saskatoon, SK, Canada, February 8-9, 2012. (Poster)
  • Jin, L., Xu, Z., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., and Wang, Y. (2012). "Mixing purple prairie clover with alfalfa reduced alfalfa N transforming to ammonia-N.", ADSA-AMPA-ASAS-CSAS-WSASAS 2012 Joint Annual Meeting, Hyatt Regency, Phoenix, AZ, USA, July 15-19, 2012, W118. (Abstract)
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., McAllister, T.A., and Wang, Y. (2012). "Mixing purple prairie clover with alfalfa reduced alfalfa N transforming to ammonia-N.", Joint Annual Meeting, American Dairy Science Association, Poultry Science Association, American Milk Producers Association, Canadian Society of Animal Science, and American Society of Animal Science, Phoenix, Arizona, USA, July 15-19, 2012.
  • Steppuhn, H., Iwaasa, A.D., Holzer, J., Johnson, D.W., and Ulmer, M. (2012). "Increasing the salinity tolerance of alfalfa to improve the effectiveness of agronomic-hydrologic practices for controlling root-zone salinization.", 2012 ASABE Annual International Meeting, Hilton Anatole Dallas, Dallas, TX, USA, July 29-August 1, 2012, Paper Number: 12-1338231, pp. 3306-3322.

2011

  • Acharya, S.N., Iwaasa, A.D., Coulman, B., Jefferson, P.G., McAllister, T.A., and Wang, Y. (2011). "New sainfoin keeps pace with alfalfa for safe grazing.", Plant Canada 2011, Saint Mary’s University, Halifax, NS, Canada, July 17-21, 2011.
  • Acharya, S.N., Iwaasa, A.D., Coulman, B., Wang, Y., and Berg, B. (2011 Internal). Advancing the development of bloat-safe alfalfa grazing through the development and establishment of improved sainfoin germplasm. BCRC 2010-2011 Annual Performance Report., AAFC Lethbridge Research Centre, AB. (Report)
  • Acharya, S.N., Iwaasa, A.D., McAllister, T.A., Wang, Y., and Thomas, J. (2011). "Animal performance and incidence of bloat in mixed alfalfa/sainfoin grazing.", Plant Canada 2011, Saint Mary’s University, Halifax, NS, Canada, July 17-21, 2011.
  • Baron, V.S., Lemke, R.L., Basarab, J.A., and Iwaasa, A.D. (2011). "Root, residue and removal-C and –N pools compared to above ground production for forage-based management practices.", 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011, Abstract 67442. (Abstract)
  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., and Lardner, H.A. (2011). "Cattle winter bale-grazing in SW Saskatchewan: the SPARC research project.", Extensive cattle wintering systems workshop, Saskatoon, SK, Canada, February 8-9, 2011. (Workshop)
  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., and Lardner, H.A. (2011). "Nutrient loss in snowmelt runoff from cattle winter bale-grazing in SW Saskatchewan.", 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011.
  • Iwaasa, A.D. (2011). "Pastue management and productivity.", Canadian Cattleman Association Action News.
  • Iwaasa, A.D. (2011). "Purple prairie clover may reduce E. coli in cattle.", Western Producer.
  • Iwaasa, A.D. (2011). "Sainfoin.", Saskatchewan Stock Growers Association (SSGA) magezine.
  • Iwaasa, A.D., Acharya, S.N., McAllister, T.A., McLeod, G.J., Coulman, B., and Jefferson, P.G. (2011 Internal). Evaluating new sainfoin germplasm/alfalfa mixtures to achieve bloat-safe grazing. Proj. ID.1151 Annual Research Project Progress Report., AAFC Semiarid Prairie Agricultural Research Centre, Swift Current, SK. (Report)
  • Iwaasa, A.D., Feist, M., Christensen, D.A., Doig, B., Peiqiang, Y., and Benot, A. (2011). "2011 Saskatchewan Advisory Council on Forage Crop: Feed and Forage Quality Sub-Committee Report.", SACFC Annual Meeting, Saskatoon, SK, Canada, December 12, 2011, 11 pages. (Presentation)
  • Iwaasa, A.D., Steppuhn, H., Schellenberg, M.P., Acharya, S.N., and Wang, Y. (2011). "A forage and grazing research update.", SWFA Annual General Meeting, Swift Current, SK, Canada, March 1, 2011.
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Schellenberg, M.P., Zhang, Y.G., McAllister, T.A., and Wang, Y. (2011). "Nutrient and tannin contents of purple prairie clover (Petalostemon purpureum) harvested at different growth stages.", Journal of Animal Science, 89(E-Suppl. 1), pp. 48. (Abstract)
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., McAllister, T.A., and Wang, Y. (2011). "Effect of tannins on in vitro ruminal degradability of purple prairie clover (Petalostemon purpureum) harvested at two growth stages in the DaisyII Fermentation System.", Journal of Animal Science, 89(E-Suppl. 1), pp. 387. (Abstract)
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., McAllister, T.A., and Wang, Y. (2011). "Effect of tannins on in vitro ruminal degradability of purple prairie clover (Petalostemon purpureum) harvested at two growth stages in the DaisyII Fermentation System.", ADSA-PSA-AMPA-CSAS-ASAS 2011 Joint Annual Meeting, New Orleans, LA, USA, July 11-14, 2011, T356. (Poster)
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., McAllister, T.A., and Wang, Y. (2011). "Nutrient and tannin contents of purple prairie clover (Petalostemon purpureum) harvested at different growth stages.", ADSA-PSA-AMPA-CSAS-ASAS 2011 Joint Annual Meeting, New Orleans, LA, USA, July 11-14, 2011, M#127. (Poster)
  • Jin, L., Zhang, Y.G., Iwaasa, A.D., Schellenberg, M.P., Xu, Z.J., McAllister, T.A., and Wang, Y. (2011). "Effect of incorporation of purple prairie clover (Petalostemon purpureum) into cool season grasses mixture on in vitro ruminal fermentation.", 60th Annual Meeting of the Canadian Society of Animal Science (CSAS), Atlantica Hotel, Halifax, NS, Canada, May 4-5, 2011, FPE-3. (Poster)
  • Jin, L., Zhang, Y.G., Iwaasa, A.D., Schellenberg, M.P., Xu, Z.J., McAllister, T.A., and Wang, Y. (2011). "Effect of incorporation of purple prairie clover (Petalostemon purpureum) into cool season grasses mixture on in vitro ruminal fermentation.", Canadian Journal of Animal Science, 91(3), pp. 476. (Abstract)
  • Jin, L., Zhang, Y.G., Iwaasa, A.D., Schellenberg, M.P., Xu, Z.J., McAllister, T.A., and Wang, Y. (2011). "Fecal shedding of Escherichia coli of cattle grazing pastures with and without purple prairie clover (Petalostemon purpureum).", 60th Annual Meeting of the Canadian Society of Animal Science (CSAS), Atlantica Hotel, Halifax, NS, Canada, May 4-5, 2011, TDC-2. (Poster)
  • Jin, L., Zhang, Y.G., Iwaasa, A.D., Schellenberg, M.P., Xu, Z.J., McAllister, T.A., and Wang, Y. (2011). "Fecal shedding of Escherichia coli of cattle grazing pastures with and without purple prairie clover (Petalostemon purpureum).", Canadian Journal of Animal Science, 91(3), pp. 503. (Abstract)
  • Lemke, R.L., Baron, V.S., Iwaasa, A.D., Farrell, R.E., and Schoenau, J.J. (2011 Internal). Quantifying nitrous oxide emissions resulting from animal manure on pasture, range and paddock by grazing cattle in Canada. Interim report prepared for Greenhouse Gas Division, Science and Technology Branch, Environment Canada., Agriculture and Agri-Food Canada (AAFC)/Agriculture et Agroalimentaire Canada (AAC). (Report)
  • Lemke, R.L., Iwaasa, A.D., Baron, V.S., Farrell, R.E., and Schoenau, J.J. (2011). "Quantifying nitrous oxide emissions resulting from beef cattle urine and dung on semiarid pasture.", 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011.
  • Lennox, T., Iwaasa, A.D., and Jensen, R. (2011 Internal). Demonstration of new sainfoin varieties under grazing. Agricultural Demonstration of Practices and Technologies (ADOPT) Final Report. (Report)
  • Schellenberg, J.J., Biligetu, B., and Iwaasa, A.D. (2011). "Botanical composition change of seeded simple and complex native forage mixtures following grazing.", IX International Rangeland Congress - IRC2011: Diverse Rangelands for a Sustainable Society, Rosario, Argentina, April 2-8, 2011, pp. 393.
  • Schellenberg, M.P., Biligetu, B., and Iwaasa, A.D. (2011). "Botanical composition of seeded simple and complex native forage mixtures following grazing.", IX International Rangeland Congress - IRC2011: Diverse Rangelands for a Sustainable Society, Rosario, Argentina, April 2-8, 2011, pp. 393.
  • Schellenberg, M.P., Biligetu, B., and Iwaasa, A.D. (2011). "Effects of grazing disturbance on re-established native forage stands for a semiarid climate.", IX International Rangeland Congress - IRC2011: Diverse Rangelands for a Sustainable Society, Rosario, Argentina, April 2-8, 2011, pp. 179.

2010

  • Iwaasa, A.D., Buckley, K.E., Baron, V.S., Wang, H., McConkey, B.G., and others (2010 Internal). Grassland/beef management impacts on greenhouse gas and ammonia emissions in prairie ecosystems. Annual Research Project Progress Report., Agriculture and Agri-Food Canada (AAFC)/Agriculture et Agroalimentaire Canada (AAC). (Report)
  • Klabi, R., Hamel, C., Iwaasa, A.D., and Raies, A. (2010). "Nitrogen Fixation and Isotope Composition of Native and Tame Forage Plants.", Soils and Crops Workshop 2010, University of Saskatchewan, Saskatoon, SK, Canada, February 24-25, 2010.
  • Meale, S.J., Chaves, A.V., Schei, I., McAllister, T.A., Iwaasa, A.D., Yang, W.-Z., and Benchaar, C. (2010). "Including essential oils in ruminal batch cultures, or in diets fed to lactating dairy cows: effects on methane emissions.", 4th International Greenhouse Gases and Animal Agriculture Conference (GGAA), Banff Park Lodge, Banff, AB, Canada, October 3-8, 2010, # T84, pp. 107. (Poster)
  • Meale, S.J., Chaves, A.V., Schei, I., McAllister, T.A., Iwaasa, A.D., Yang, W.-Z., and Benchaar, C. (2010). "Including essential oils in ruminant batch cultures or in diets fed to lactating dairy cows: Effects on methane emissions.", in McGeough, E.G. and McGinn, S.M. (eds.) - Proceedings of the 4th International Greenhouse Gases and Animal Agriculture Conference (GGAA), Banff, AB, Canada, October 3-8, 2010, pp. 136.
  • Patel, M., Danielsson, R., Börjesson, G., Iwaasa, A.D., Spörndly, E., Wredle, E., and Bertilsson, J. (2010). "Enteric methane emissions from dairy cows fed different proportions of highly digestible grass silage.", 4th International Greenhouse Gases and Animal Agriculture Conference (GGAA), Banff Park Lodge, Banff, AB, Canada, October 3-8, 2010.

2009

  • Baron, V.S., Lemke, R.L., Young, D.G., Basarab, J.A., Naeth, M.A., and Iwaasa, A.D. (2009). "Pasture type and site effects on annual nitrous oxide emission rate.", 62nd Society for Range Management Annual Meeting, Albuquerque Convention Center, Albuquerque, NM, USA, February 8-12, 2009, Paper No. 100-4. (Abstract)
  • Baron, V.S., Lemke, R.L., Young, D.G., Basarab, J.A., and Iwaasa, A.D. (2009). "Nitrous oxide emission from old and new pastures.", 2009 ASA-CSSA-SSSA International Annual Meeting, Pittsburgh, PA, USA, November 1-5, 2009. (Abstract)
  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., and Lardner, B. (2009). "Nutrient concentrations and forms in runoff from cattle winter bale-grazing sites.", Great Lakes Phosphorus Forum with SERA-17 Annual Meeting, Hilton Hotel and St. Clair Centre, Windsor, ON, Canada, July 28-31, 2009. (Poster)
  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., and Lardner, B. (2009). "Nutrient concentrations and forms in runoff from cattle winter bale-grazing sites.", Joint Annual Meeting of the CSA-CSSS-CSAFM, University of Guelph, Guelph, ON, Canada, August 5-7, 2009. (Presentation)
  • Lemke, R.L., Baron, V.S., Iwaasa, A.D., Farrell, R.E., and Schoneau, J.J. (2009 Internal). Quantifying nitrous oxide emissions resulting from animal manure on pasture, range and paddock by grazing cattle in Canada. Interim report for Environment Canada. (Report)
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