Ralph C. Martin

Ralph Martin
Professor (retired)



B.A. Carleton University;
M.Sc. Carleton University;
Ph.D. MacDonald College, McGill University


Crop Science Building


Red Clover

My approach to sustainable food production is to produce enough food to meet dietary needs today, while preserving productive capacity for future generations of people and other species. This is within the context of healthy soil, clean air and water, and regenerative energy to support resilient farming and fishing communities.

My research involves collaborative inquiries across disciplines. My training and specific contributions pertain to multiple cropping systems, nitrogen use efficiency, forage agronomy and pasture management.


Relevant Links:

Selected Publications:


Martin, R.C. (2019). Food Security: From Excess to Enough. Dundurn Press, Toronto, ON.

Martin, R.C. and MacRae, R. [Eds] (2014). Managing energy, nutrients, and pests in organic field crops. CRC Press, Boca Raton, FL.

Refereed Publications

Highly Qualified Personnel trained are underlined

Laamrani, A., Voroney, P.R., Berg, A.A., Gillespie, A., March, M., Deen, W. and Martin, R.C. (2020). Temporal Change of Soil Carbon on a Long-Term Experimental Site with Variable Crop Rotations and Tillage Systems. Agronomy 10 (6), 840; .

Ogilvie, C.M, Loucks, C. Beach, H. Johnson, P. and Martin, R.C..(2020). Survey of interseeded red clover management and perceived challenges by Ontario wheat growers. Can. J. Plant Sci. http://dx.doi.org/ DOI:10.1139/CJPS-2020-0039 .

Shoaib Saleem, Jana Levison, Beth Parker, Ralph Martin and ElishaPersaud. (2020). Impacts of climate change and different crop rotation scenarios on groundwater nitrate concentrations in a sandy aquifer. Sustainability 12 (3):1153. https://D.org/10.3390/su12031153 .

Scott G. Gardner, Jana Levison, Beth L. Parker, Ralph C. Martin. (2020). Groundwater nitrate in three distinct hydrogeologic and land use settings in southwestern Ontario, Canada. Hydrogeology Journal. https://DOI.org/10.1007/s10040-020-02156-4 .

Wyngaarden, S. Lightburn, K. and Martin, R.C. (2019). Optimizing livestock feed provision to improve the efficiency of the agri-food system. Agroecology and Sustainable Food Systems 44: 188-214. DOI.org/10.1080/21683565.2019.1633455 .

Laamrani, A., Berg,A., Voroney,P., Feilhauer, H., Blackburn, L., March, M., Dao, .D.,  He, Y. and Martin, R.C. (2019). Ensemble identification of spectral bands related to soil organic carbon levels over an agricultural field in southern Ontario, Canada. Remote Sensing. 11 (11): 1298. https://DOI.org/10.3390/rs11111298 .

Stefanson, A.L., Tsao, R., Liu, R., Duizer, L., Bakovic, M. and Martin, R.C. (2019). Effect of variety, soil fertility status and agronomic treatments on carrot mineral and phytochemical composition and consumer liking of flavour traits. Journal of the Science of Food and Agriculture. https://DOI.org/10.1002/jsfa.9807 .

Ogilvie, C.M., Deen, W. and Martin, R.C. (2019). Service crop management to maximize crop water supply and improve agroecosystem resilience: A review. J Soil Water Conservation 74:389-404. DOI:10.2489/jswc.74.4.389 .

Rotz. S. Gravely, E., Mosby, I., Duncan,E., Finnis, E., Horgan, M., LeBlanc, J., Martin, R.C., Tait Neufeld, H., Pant, L., Shalla, V., Fraser, E., (2019). Automated pastures and the digital divide: How agricultural technologies are shaping labour and rural communities. Journal of Rural Studies. target="_blank">https://DOI.org/10.1016/j.jrurstud.2019.01.023 .

Wartman, P., Van Acker and Martin, R.C. (2018).  Temperate agroforestry: How forest garden systems combined with people-based ethics can transform food systems. Sustainability 10(7), 2246; p>

Loucks, C. E.S., Deen, W., Gaudin, A.C.M, Earl, H.J., Bowley, S.R. and Martin, R.C. (2018). Genotypic differences in red clover (Trifolium pratense L.) response under severe water deficit. Plant and Soil. 425(1), 401-414. http://link.springer.com/article/10.1007/s11104-018-3594-9 .

Beach, H.M., Laing, K.W., Van De Walle, M. and Martin, R.C. (2018). The Current State and Future Directions of Organic No-Till Farming with Cover Crops in Canada, with Case Study Support. Sustainability 10 (2), 373;

Manns, H. and Martin, R.C. (2018). Cropping system yield stability in response to plant diversity and soil organic carbon in temperate ecosystems. Agroecology and Sustainable Food Systems 42 (7): 724-750.  https://DOI.org/10.1080/21683565.2017.1423529 .

Rotz, S., Fraser, E. D. G. and Martin, R.C. (2017). Situating Tenure, Capital and Finance in Farmland Relations: Implications for stewardship and agroecological health in Ontario. Journal of Peasant Studies. http://dx.DOI.org/10.1080/03066150.2017.1351953 .

Kong, Y., D. Llewellyn, K. Schiestel, M.G. Scroggins, D. Lubitz, M.R. McDonald, R. Van Acker, R.C. Martin and Y. Zheng. (2017). High Tunnels can Promote Growth, Yield, and Fruit Quality of Organic Bitter Melons (Momordica charantia L.) in Regions with Cool and Short Growing Seasons. Hort Science. 52 (1): 65-71. DOI: 10.21273/HORTSCI11217-16.

Audette, Y., I.P. O'Halloran, L.J. Evans, R.C. Martin and R.P. Voroney. (2016). Kinetics of phosphorus forms applied as inorganic and organic amendments to a calcareous soil II: effects of plant growth on plant available and uptake phosphorus. Geoderma. 279: 70-76.

Wartman, P., K. Dunfield, K. Khosla, C. Loucks, R. Van Acker and R.C. Martin. (2016). The establishment of apple orchards as temperate forest garden systems and their impact on indigenous bacterial and fungal population abundance in Southern Ontario, Canada. Renewable Agriculture and Food Systems. DOI: 10.1017/S1742170516000120.

Manns, H., G. Parkin and R.C. Martin. (2016). Evidence of a union between organic carbon and water content in soil. Canadian Journal of Soil Science. In press. DOI: 10.1139/cjss-2015-0084.

Fraser, E., A. Legwegoh, K.C. Krishna, M. CoDyre, G. Dias, S. Hazen, R. Johnson, R.C. Martin, L. Ohberg, S. Sethuratnam, L. Sneyd, J. Smithers, R. Van Acker, J. Vansteenkiste, H. Wittman, R. Yada and A.A. Legwegoh. (2015). Biotechnology or organic? Extensive or intensive? Global or local? A critical review of potential pathways to resolve the global food crisis. Trends in Food Science and Technology. 48: 78-87. DOI: 10.1016/j.tifs.2015.11.006.

Wyngaarden, S., A.C. Gaudin, W. Deen and R.C. Martin. (2015). Expanding Red Clover (Trifolium Pratense) Usage in the Corn-Soy-Wheat Rotation. Sustainability. 7 (11): 15487-15509. DOI: 10.3390/su71115487.

Gaudin, A.C.M., T.N. Tolhurst, A.P. Ker, K. Janovicek, C. Tortora, R.C. Martin and W. Deen. (2015). Increasing Crop Diversity Mitigates Weather Variations and Improves Yield Stability. PLoS ONE. 10 (2): e0113261. DOI: 10.1371/journal.pone.0113261.

Parizeau, K., M. Von Massow and R.C. Martin. (2014). Household-level dynamics of food waste production and related beliefs, attitudes, and behaviours in a municipality in Southwestern Ontario. Waste Management. 35: 207-217.

Mederos, A., D. Kelton, A.S. Peregrine, J. VanLeeuwen, S. Fernández, A. LeBoeuf, P. Menzies and R.C. Martin. (2014). Evaluation of the utility of subjective clinical parameters for estimating fecal egg counts and packed cell volume in Canadian sheep flocks. Veterinary Parasitology. 205: 568-574. DOI: 10.1016/j.vetpar.2014.08.030.

Gaudin, A.C.M., K. Janovicek, R.C. Martin and W. Deen. (2014). Approaches to Optimizing Nitrogen Fertilization in a Winter Wheat - Red Clover (Trifolium pratense L.) Relay Cropping System. Field Crops Research. 155: 192-201. DOI: 10.1016/j.fcr.2013.09.005.

Fredeen, A., S. Juurlink, M. Main, T. Astatkie and R.C. Martin. (2013). Implications of dairy systems on enteric methane and postulated effects on total greenhouse gas emission. Animal. 7: 1875-1883.

Abdulla, M., R.C. Martin, M. Gooch and  E. Jovel. (2013). The importance of quantifying food waste in Canada. Journal of Agriculture, Food Systems, and Community Development. 3 (2): 137-151.

Gaudin, A.C.M., S. Westra, C.E.S. Loucks, K. Janovicek, R.C. Martin and W. Deen. (2013). Improving Resilience of Northern Field Crop Systems Using Inter-Seeded Red Clover: A Review. Agronomy. 3: 148-180. DOI: 10.3390/agronomy3010148.

Graves, M.E., N. McLean, G. Jones and R.C. Martin. (2012). Pasture and sheep performance response to sod-seeding red clover (Trifolium pratense L.) or white clover (Trifolium repens L.) into naturalized pastures in eastern Canada. Animal Feed Science and Technology. 177: 7-14.

Halde, C., A.M. Hammermeister, N.L. Mclean, K.T. Webb and R.C. Martin. (2011). Soil compaction under varying rest periods and levels of mechanical disturbance in a rotational grazing system. Canadian Journal of Soil Science. 91 (6): 957-964.

Liu, K., A.M. Hammermeister, P.R. Warman, C.F. Drury and R.C. Martin. (2011). Assessing soil nitrogen availability in contrasting cropping systems at the end of transition to organic production. Canadian Journal of Soil Science. 91 (4): 493-501.

Lynch, D.H., R. MacRae and R.C. Martin. (2011). The Carbon and Global Warming Potential Impacts of Organic Farming: Does It Have a Significant Role in an Energy Constrained World? Sustainability (Open Access) 3: 322-362. http://www.mdpi.com/2071-1050/3/2/322. Sustainability Best Paper Award for 2015. First Prize, Review paper category http://www.mdpi.com/2071-1050/7/2/2256/htm.

Guthrie, A.D., J. Learmount, J. VanLeeuwen,, A.S. Peregrine, D. Kelton, P.I. Menzies, S. Fernándeza, R.C. Martin, A. Mederosa and M.A. Taylor. (2010). Evaluation of a British computer model to simulate gastrointestinal nematodes in sheep on Canadian farms. Veterinary Parasitology. 174: 92-105.

Liu, K., A.M. Hammermeister, M.H. Entz, T. Astatkie, P.R. Warman and R.C. Martin. (2010). Nitrogen availability in an organic potato crop following a 3., 20 year transition under contrasting farming systems. Journal of Sustainable Agriculture. 34 (8): 821-835.

MacRae, R.J., D. Lynch and R.C. Martin. (2010). Improving Energy Efficiency and GHG Mitigation Potentials in Canadian Organic Farming Systems. Journal of Sustainable Agriculture. 34 (5): 549-580.

Mederosa, A., S. Fernández, J. VanLeeuwen, A.S. Peregrine, D. Kelton, P. Menzies, A. LeBoeufd and R.C. Martin. (2010). Prevalence and distribution of gastrointestinal nematodes on 32 organic and conventional commercial sheep farms in Ontario and Quebec, Canada (2006–2008). Veterinary Parasitology. 170: 244-252.

Sharifi, M., D.H. Lynch, B.J. Zebarth, Z. Zheng and R.C. Martin. (2009). Evaluation of nitrogen supply rate measured by in situ placement of Plant Root Simulator probes as a predictor of nitrogen supply from soil and organic amendments in potato crop. American Journal of Potato Research. 86: 356-366.

MacRae, R., R.C. Martin, M. Juhasz and J. Langer. (2009). Ten percent organic within 15 years: Policy and programme initiatives to advance organic food and farming in Ontario, Canada. Renewable Agriculture and Food Systems. 24 (2): 120-136.

Lui, K., A.H. Hammermeister, D. Patriquin and R.C. Martin. (2008). Assessing organic potato cropping systems at the end of the first cycle of four., 20 year rotations using principal component analysis. Canadian Journal of Soil Science. 88: 543-552. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3056

Lynch, D., Z. Zheng, B. Zebarth and R.C. Martin. (2008). Organic amendment effects on tuber yield, plant N uptake and soil mineral N under organic potato production. Renewable Agriculture and Food Systems. 23 (3): 250-259.

Beavers, R.L., A.M. Hammermeister, B. Frick, T. Astatkie and R.C. Martin. (2008). Spring wheat yield response to variable seeding rates in organic farming systems at different fertility regimes. Canadian Journal of Plant Science. 88: 43-52.

Roberts, C. J., D.H. Lynch, R.P. Voroney, R.C. Martin and S.D. Juurlink. (2008). Nutrient budgets of Ontario organic dairy farms. Canadian Journal of Soil Science. 88: 107-114.

Boiteau, G., D.H. Lynch and R.C. Martin. (2008). Influence of Fertilization on the Colorado Potato Beetle, Leptinotarsa decemlineata (Say), in Organic Potato Production. Environmental Entomology. 37 (2): 575-585.

MacRae, R.J., B. Frick and R.C. Martin. (2007). Economic and social impacts of organic production systems. Canadian Journal of Plant Science. 87: 1037-1044.

Nams, V.O. and R.C. Martin. (2007). The effects of turnout date to pasture on cattle weight gain. Canadian Journal of Animal Science. 87: 527-534. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3057

Martin, R.C., D.H. Lynch, B. Frick and P. Van Straaten. (2007). Phosphorous Status on Canadian Organic Farms. Journal of the Science of Food and Agriculture. 87: 2737-2740.

Pridham, J.C., M.H. Entz, R.C. Martin and P.J. Hucl. (2007). Weed, disease and grain yield effects of cultivar mixtures in organically managed spring wheat. Canadian Journal of Plant Science. 87: 855-859.

Wiens, M.J., M.H. Entz, R.C. Martin and A.M. Hammermeister. (2006). Agronomic benefits of alfalfa mulch applied to organically managed spring wheat. Canadian Journal of Plant Science. 86: 121-131. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3058

Hammermeister, A.M., T. Astatkie, E.A. Jeliazkova, P.R. Warman and R.C. Martin. (2006). Nutrient supply from organic amendments applied to unvegetated soil, lettuce and orchard grass. Canadian Journal of Soil Science. 86: 21-33.

Sturz, A.V., D.H. Lynch, R.C. Martin and A.M. Driscoll. (2006). Influence of compost tea, powdered kelp and ManzateR75 on the community composition and antibiosis against Phytophthora infestans of bacteria in the potato phylloplane. Canadian Journal of Plant Pathology. 28: 52-62.

Astatkie, T., A.A. Joseph and R.C. Martin. (2006). A two., 20level unreplicated factorial design to determine the effect of organic and inorganic fertilizers on dry mater yield of permanent pasture. Renewable Agriculture and Food Systems. 21 (2): 106-113.

Degenhardt, R., R.C. Martin and D. Spaner. (2005). Organic farming in Central Alberta: Current trends, production constraints and research needs. Journal of Sustainable Agriculture. 27 (2): 151-171.

Yiridoe, E.K., S. Bonti-Ankomah, and R.C. Martin. (2005). Comparison of consumer perceptions and preference toward organic versus conventionally produced foods: A review and update of the literature. Renewable Agriculture and Food Systems. 20 (4): 193-205.

Lynch, D.H., R.D.H. Cohen, A. Fredeen, G. Patterson and R.C. Martin. (2005). Management of Canadian prairie region grazed grasslands: Soil C sequestration, livestock productivity and profitability. Canadian Journal of Soil Science. 85: 183-192.

Martin, R.C., T. Astatkie, J.M. Cooper and A.H. Fredeen. (2005). A comparison of methods used to determine biomass on naturalized swards. Journal of Agronomy and Crop Science. 191: 152-160.

Thorvaldsson, G. and R.C. Martin. (2004). Growth response of seven perennial grass species to three temperature regimes applied at two growth stages. Acta Agriculturae Scandinavica. 54: 14-22.

Lynch, D.H., R.W. Jannasch, A.H. Fredeen and R.C. Martin. (2003). Improving the nutrient status of a commercial dairy farm: An integrated approach. American Journal of Alternative Agriculture. 18 (3): 137-145.

Boyd, N.S., R. Gordon and R.C. Martin. (2002). Relationship between leaf area index and ground cover in potato under different management conditions. Potato Research. 45: 117-129.

Fredeen, A.H, T. Astatkie, R.W. Jannasch and R.C. Martin. (2002). Productivity of grazing Holstein cows in Atlantic Canada. Journal of Dairy Science. 85: 1331-1338.

Papadopoulos, Y.A., R.C. Martin, A.H. Fredeen, K.B. MacRae and M.A. Price. (2001). Grazing and the addition of white clover improves the nutritional quality of orchardgrass cultivars. Canadian Journal of Animal Science. 81: 597-600.

Boyd, N.S., R. Gordon, S.K. Asiedu and R.C. Martin. (2001). The effects of living mulches on tuber yields of potato (Solanum tuberosum L.). Biological Agriculture and Horticulture. 18: 203-220.

Boyd, N.S., T. Astatkie, A.H. Fredeen and R.C. Martin. (2001). Rotationally stocked beef cattle response to daily and weekly residence. Journal of Range Management. 54: 39-43.

Martin, R.C. (2000). The Application of Deep Ecology in Cuba. The Trumpeter. 16 (1). http://trumpeter.athabascau.ca/index.php/trumpet/article/view/148/177.

Carruthers, K., B. Prithiviraj, Q. Fe, D. Cloutier, R.C. Martin, R.C. and D.L. Smith. (2000). Intercropping of corn with soybean, lupin and forages: Silage yield and quality. Journal of Agronomy and Crop Science. 185: 177-186.

Prithiviraj, B., K. Carruthers, Q. Fe, D. Cloutier, R.C. Martin and D.L. Smith. (2000). Intercropping of corn with soybean and lupin for silage: Effect of seeding date on yield and quality. Journal of Agronomy and Crop Science. 185: 129-136.

Carruthers, K, B. Prithiviraj, Q. Fe, D. Cloutier, R.C. Martin and D.L. Smith. (2000). Intercropping corn with soybean, lupin and forages: yield component responses. European Journal of Agronomy. 12: 102-115.

Muto, P.J. and R.C. Martin. (1999). The growth of white clover seeded into a permanent pasture under both grazing and mowing regimes. Grass and Forage Science. 55: 59-68.

Jannasch, R. and R.C. Martin, R.C. (1999). The potential for capturing the biological yield of white lupin by intercropping with cereals. Biological Agriculture and Horticulture. 17: 113-130.

Martin, R.C., P.R. Greyson and R. Gordon. (1999). Competition between corn and a living mulch. Canadian Journal Plant Science. 79: 579-586. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3059

Martin, R.A., B.R. Christie, Y.A. Papadopoulos and R.C. Martin. (1999). AC Christie red clover. Canadian Journal of Plant Science. 79: 257-258.

Martin, R.C., T. Astatkie and J.M. Cooper. (1998). The effect of soybean variety on corn., 20 soybean intercrop biomass and protein yields. Canadian Journal of Plant Science. 78: 289-294.

Martin, R.C., T. Astatkie and J.M. Cooper. (1998). The effect of bradyrhizobium strains on monocropped and intercropped soybean (Glycine max L. Merr.) biomass and protein. Journal of Agronomy and Crop Science. 181: 1-6.

Altinok, S., H.G. Sampson, R.C. Martin and Y.A. Papadopoulos. (1997). The morphology and yield of barley (Hordeum vulgare L.) and forage legumes in intercrops. Turkish Journal of Agriculture and Forestry. 21: 605-613.

Altinok, S., A. Erac and R.C. Martin. (1997). The effects of cutting at different phenological stages to shoot and root development and forage yield of annual medics. Turkish Journal of Agriculture and Forestry. 21: 371-378.

Martin, R.C., A.R.J. Eaglesham, D.L. Smith and H.D. Voldeng. (1995). Factors affecting nitrogen benefit from soybean to interplanted corn. Environmental and Experimental Botany. 35: 497-505.

Fraser, J., K. Sutherland and R.C. Martin. (1993). Effects of autumn harvest date on the performance of white clover/grass mixtures in Nova Scotia. Journal of Agricultural Science. 121: 315-321.

Martin, R.C., H.D. Voldeng and D.L. Smith. (1991). The effects of intercropping spacing patterns on the silage yields of maize and soybean. Journal of Agronomy and Crop Science. 167: 81-90.

Martin, R.C., H.D. Voldeng and D.L. Smith. (1991). Nitrogen transfer from nodulating soybean to corn and to nonnodulating soybean in intercrops: Direct 15N labelling methods. The New Phytologist. 117: 233-241.

Martin, R.C., H.D. Voldeng and D.L. Smith. (1991). Nitrogen transfer from nodulating soybean to corn and to nonnodulating soybean in intercrops: The 15N dilution method. Plant and Soil. 132: 53-63.

Martin, R.C., H.D. Voldeng and D.L. Smith. (1990). Intercropping corn and soybean for silage in a cool temperature region: yield, protein and economic benefits. Field Crops Research. 23: 295-310.

Martin, R.C., J.T. Arnason, J.D.H. Lambert, P. Isabelle, H.D. Voldeng and D.L. Smith. (1989). Reduction of European Corn Borer (Lepidoptera: Pyralidae) damage by intercropping corn with soybean. Journal of Economic Entomology. 82: 1455-1459.


Book Chapters

Graves, M. and Martin, R.C. 2016. Grassland management to minimise the environmental impact of dairy farming. In Van Belzen, N. [Ed.] Achieving sustainable production of milk. Burleigh Dodds Science Publishing. Cambridge, UK. (in press).

Deen, W. Martin, R.C., Hooker, D. and Gaudin, A. 2015. Crop rotation trends: past, present and future benefits and drivers. In Ma, B. [Ed.] Crop Rotations: Farming Practices, Monitoring and Environmental Benefits.  Nova Science Publishers, Inc.   

Graves, M., Deen, B., Fraser, E. and Martin, R.C. 2014. Practical Response: Options for Agriculture. In Caldwell, W. [Ed.] Planning for Rural Resilience: Coping with Climate Change and Energy Futures. University of Manitoba Press

Martin, R.C. and MacRae, R. 2014. General discussion and Conclusion. In Martin, R.C. and MacRae, R. [Eds] Managing energy, nutrients, and pests in organic field crops. CRC Press, Boca Raton, FL.

MacRae, R., Martin, R.C., Juhasz, M. and Langer, J. 2014. Ten percent organic within 15 years: Policy and program initiatives to advance organic food and farming in Ontario, Canada. In Martin, R.C. and MacRae, R. [Eds] Managing energy, nutrients, and pests in organic field crops. CRC Press, Boca Raton, FL.

MacRae, R., Lynch, D.H. and Martin, R.C. 2014. Will organic food and farming solve food systems problems? Part I1: Consumer, economic and community issues. In Martin, R.C. and MacRae, R. [Eds] Managing energy, nutrients, and pests in organic field crops. CRC Press, Boca Raton, FL.

MacRae, R., Lynch, D.H. and Martin, R.C. 2014. Will organic food and farming solve food systems problems? Part 1: Environment. In Martin, R.C. and MacRae, R. [Eds] Managing energy, nutrients, and pests in organic field crops. CRC Press, Boca Raton, FL.

Hammermeister, A.H., Pidskalny, R., Nelson, K. and Martin, R.C. 2014. Establishing priorities for organic research in Canada. In Martin, R.C. and MacRae, R. [Eds] Managing energy, nutrients, and pests in organic field crops. CRC Press, Boca Raton, FL.

MacRae, R., Hammermeister, A.H. and Martin, R.C. 2014. Introduction. In Martin, R.C. and MacRae, R. [Eds] Managing energy, nutrients, and pests in organic field crops. CRC Press, Boca Raton, FL.

Lynch, D.H., Sumner J., and Martin R. C. 2014. Transforming recognition of the social, ecological and economic goods and services derived from organic agriculture in the Canadian context. In Guyomard H., Meynard J.M., and Bellon, S. INRA, France [Eds] Organic Farming; prototype for sustainable agriculture. Springer, New York.

Martin, R.C.. (2009). Living from the land in Nova Scotia. In Choyce, L. [ed.] Nova Scotia: Visions of the Future. Pottersfield Press, Lawrencetown Beach, NS.

Martin, R.C.. (2009). Grazing for Profit, Health and Environmental Benefits. In Beaton, E. [ed] Connecting the dots: social and environmental Perspective on Agriculture and rural Life in Atlantic Canada. Caper Breton University Press. Sydney, NS.

van Acker, R.C., McLean, N. and Martin, R.C. (2007). Development of quality assurance protocols to prevent GM., 20contamination of organic crops. In Cooper, J. et al. [eds.] Handbook of organic food safety and quality. Woodhead Publishing, Cambridge.


Selected Talks

Martin, R.C. 2016. Tensions and synergies in the overlapping environments where food is grown, processed and consumed. Green Conversation Series - The Learning Ministries. Toronto, ON (35). March 10.

Martin, R.C. 2016. The role of urban citizens to sustain food production. Ideas to Impact, 2016 U of T Sustainability Conference. Toronto, ON (70). Jan. 30.

Martin, R.C., Parizeau, K and Von Massow, M. 2015. Food waste concerns all of us. Food Forever: Sowing the seeds for sustainable diets. Nutrition and Health Symposium 2015, Dairy Farmers of Canada. Via Adobe Connect, Edmonton AB (100), October 6. In person in Toronto ON (250) and on Webcast (350), October 7. In person in Montreal QC (350) and on webcast (450), October 8. Via Adobe Connect, Moncton NB (100), October 9.

Martin, R.C. 2015.  Leadership in Agriculture and Rural Ontario. Advanced Agricultural Leadership Program, Rural Ontario Institute. Guelph, ON. (100). Sept. 21.

Martin, R.C. 2015. Sustaining Organic Food Production for Adequate Consumption. School of Agriculture, University of Zambia, Lusaka, Zambia (15). July 20.

Martin, R.C., Parizeau, K. and Von Massow, M. 2015. We are what we eat and what we waste or waist. Appetite for Change Panel, Green Living Show, Toronto ON (200).  March 28.

Martin, R.C. 2015. Safe, Healthy, Just and Sustainable Food Systems. Keynote talk, Sustainable Food Systems Workshop, University of Manitoba, Winnipeg MB (100). March 13.

Martin, R.C. 2014. Sustaining Food Production: Challenges and Innovations for 21st Century Agriculture. Keynote talk, Queen’s Global Innovation Conference, Queens University, Kingston, ON (70). November 14, 2014

Martin, R.C. 2014. The business of sustaining available food. Practical Farmers of Ontario, opening talk. University of Guelph, Guelph, ON (200). Oct 4, 2014

Martin, R.C. 2014. Optimizing Food and Agriculture Synergies, by Region. Canadian College and University Food Service Association, Annual Conference. Niagara Falls, ON. June 27, 2014.

Martin, R.C. 2014. Healthy soil and resilient crops as climate shifts.  International conference on rural-urban connections and the future of family farming. Ryerson University, Toronto, ON. June 23, 2014.

Martin, R.C., Parizeau, K and Von Massow, M. 2014. Food Waste:  A Fetid Web of Lost Opportunities. The Dietitians of Canada National Conference. Ottawa, ON. June 13, 2014.

Martin, R.C. 2014. Why are there hungry people in Ontario? Ontario Association of Food Banks Annual Conference. St. Catharines ON. June 9, 2014.

Martin, R.C. 2014. Conserving and Sustaining as Food Security Emerges. Environmental Knowledge Sharing & Learning Seminar Series, Environment North. Thunder Bay, ON. May 29, 2014.

Martin, R.C. 2104. Sustaining agriculture and food in Ontario. Ontario Institute of Agrologists (OIA) Conference. Burlington, ON. April 12, 2014.

Martin, R.C. 2014. Urban and rural citizens collaborating to sustain food production. Brantford Rotary Club, Brantford, ON. March 28, 2014.

Martin, R.C. 2014. Using Metrics and Private Standards to Improve the Food Sector’s Environmental Performance. Concurrent Session A3, 3rd Canadian Food Summit 2014. Conference Board of Canada. Toronto, ON. March 18, 2014.

Martin, R.C., Graves, M., Fraser, E. and Deen, W. 2014.  Sustaining Agricultural Capacity in Canada. Sustainability Leadership Panel, Dairy Farmers of Canada, Annual Dairy Policy Conference, Ottawa, ON. Feb. 5, 2014

Martin, R.C. 2013. Does it Make Sense to Build a Local Food System in a Globalizing World.  Keynote address, Second Annual Headwaters Food Summit.  Caledon, ON.  Nov 25, 2103.

Martin, R.C. 2013. Production Losses Associated with Food Waste. Bring Food Home 2013: Building Bridges Together, Windsor, ON.  Nov 19, 2103.

Martin, R.C. 2013. Wide Web of Waste. Cut Waste, GROW PROFIT™ 2013 Forum, Mississauga, ON. Nov 12, 2013.

Martin, R.C. 2013. The Many Impressions of Sustainability. Breakfast Seminar, Demonstrating Sustainability within the Canadian Agri-Food System. George Morris Centre, Guelph ON. Sept. 30, 2013.

Martin, R.C. 2013. Going Green with Food. The National Student Food Summit, University of Toronto. Toronto, ON. Aug. 17, 2103.

Martin, R.C. 2013. Healthy Soil, Healthy People and the Steps in Between. By phone with a slide deck to Dietitians of Canada Annual Conference 2013. Victoria, BC. June 15, 2013.

Martin, R.C. 2013. Linking Soil Quality to Economic Incentives. Strategic Conference on Food Farms Fish and Finance. CSI Annex, Toronto, ON. May 2013.

Martin, R.C. 2013. Evolving Landscape of Sustainable Agriculture. Conference of Canadian University Environmental Science Network and the Canadian College Environmental Network. Fleming College, Lindsay, ON. May 24, 2013.

Martin, R.C., Graves, M., Fraser, E. and Deen, W. 2013.The Urgent and Transformative Challenge for Agriculture to Adapt to Climate Change. 1st Annual Ontario Climate Consortium (OCC) Research Symposium. University of Toronto, Toronto, ON. May 13, 2013.

Martin, R.C., Graves, M., Fraser, E. and Deen, W. 2013. Challenges and Changes for 21st Century Agriculture. Keynote talk at Food, Agriculture and Sustainability: graduate student workshop, University of Waterloo, Waterloo, ON. April 2013.

Martin, R.C. 2103. Food Waste: Reduce and then Recycle. Taste of Woolwich, Breslau, ON. April, 2013.

Martin, R.C., Graves, M., Fraser, E. and Deen, W. 2013. Sustaining Agricultural Capacity in Canada. Concurrent Session A2, Environmental Impacts of the Food System, 2nd Canadian Food Summit 2013. Conference Board of Canada. Toronto, ON. April 2013.

Martin, R.C. 2013. Innovations in Sustainable Research for PEI. Presentation by Phone and slides to PEI ADAPT Council AGM/Conference. Charlottetown, PEI. March 2013.

Deen, B., Graves, M.E. Fraser, E.D.G. and Martin, R.C. 2013. Changing demands on agricultural land: Are reforms urgent? The Ninth Annual Banff Conference on Agriculture, Food and the Environment. Alberta Inst of Agrologists, Banff, AB. March, 2013. http://www.albertaagrologists.ca/files/conferences/2013%20AIA%20Conference/

Martin, R.C. 2013. Sustainable net energy production when producers and consumers work together. GRO Summit and Canadian Biogas Conference. London, ON. March, 2013.

Martin, R.C. 2013. Managing Too Much or Too Little Water, at Inconvenient Times. Gala Dinner Speaker, Canadian Organic Growers, Eco Farm Day. Cornwall, ON. February, 2013.

Martin, R.C. 2013. Soil Health and Its Benefits Along the Value Chain. Ontario Soil and Crop Improvement Association, Annual Meeting. London, ON. February, 2013.

Martin, R.C. 2013. Farmland Has Many Values. Township of Mulmur's Info Exchange - Town Hall. Terra Nova, ON. January 2013.

Martin, R.C. 2013. Environmental implications of growing biomass crops in Ontario. Ontario Biomass Producers' Cooperative Biomass Forum. Guelph, ON. January 2013.

Martin, R.C. 2012. A Dynamic Futuristic Forage and Grassland Industry Fuelled by Innovation. Opening talk, Canadian Forage and Grassland Association AGM and Conference 2012. Mississauga ON. December, 2012.

Martin, R.C. 2012. Adapting agricultural production to a new unknown normal. Guest speaker for Ecological Farmers Association of Ontario, AGM. Marden, ON. November, 2012.

Martin, R.C. 2012. Reducing Food Waste. Cut Waste, GROW PROFIT forum of value Chain Management Centre. Mississauga, ON. November, 2012.

Martin, R.C. 2012. Functioning Farm Eco-Systems. Afternoon plenary talk, Christian Farmers Federation of Ontario Annual Convention. Waterloo, ON. November, 2012.

Martin, R.C. 2012. Recalibrating Food Systems. Keynote talk, Loblaw Brands Innovation Summit. Toronto ON. November, 2012.

Martin, R.C. 2012. Sustaining Food Production in a World Deviating from Normal. Risk Management Alliance, fall meeting. Ingersoll, ON. September, 2012.

Martin, R.C. 2012. Feeding the World. Is it the Right Question? Kitchener Public Library, Kitchener, ON. September, 2012.

Martin, R.C. 2012. Forages and Organic Agriculture. Farm tour of Glengarry Soil and Crop Improvement Association. Alexandria and surrounding area, ON. August, 2012.

Martin, R.C. 2012. Organic agriculture and sustainable agriculture. Ontario Agri-Food Education Classroom training for teachers. University of Guelph, Guelph, ON. July, 2012.

Martin, R.C. 2012. Challenges and Opportunities for Ontario Organic Producers. Fruit and Vegetable Xchange Producers Meeting. St. Williams, ON. July, 2012.

Martin, R.C. 2012. Extensive land use to sustain agriculture. Canadian Agricultural Economics Society 2012 Annual meeting. Niagara Falls, ON. June, 2012.

Martin, R.C. 2012. Food Research in the Age of "Sustainability." Plenary Session, Canadian Association for Food Studies 2012 Conference. Wilfred Laurier University, Waterloo, ON. May, 2012.

Martin, R.C. 2012. The Business Case for Sustaining Production of Healthy Food. Healthy Outcomes Promoting Economic Success Workshop, Canadian Partnership Against Cancer. Halifax, NS. May, 2012.

Martin, R.C. 2012. Environmental, Social and Economic Sustainability of Food. SEETalk, University of Guelph, Guelph, ON. March, 2012.

Martin, R.C. 2012. Linking Environmental Health and Human Health as Our Climate Becomes Less Steady. Ausable Bayfield Conservation Authority, Annual Conservationist of the Year Award Evening. Exeter, ON. March 2012.

Martin, R.C. 2012. The future of food and agriculture. Presentation by Polycom to Building Sustainable Communities Conference. Kelowna, B.C. March, 2012.

Martin, R.C. 2012. Organic research in Canada: Still small but roaring. Canadian Organic Science Conference, Winnipeg, MB. February, 2012.

Martin, R.C. 2012. Matching Food Consumption to Production. 9TH Certified Crop Advisors Conference. London, ON. January, 2012.

Martin, R.C. 2011. The role of agrologists in sustaining food production. Ontario Inst. of Agrology. Mississauga, ON. November, 2011

Martin, R.C. 2011. Ontario farmers and the business of sustaining food production. Ontario Federation of Agriculture, AGM. Toronto, ON. November, 2011.


Op-Ed Articles

Sustainable Intensification is Not Enough [268KB] Jul-18

A Way to Stop the Decline of Soil Organic Matter [125KB] Feb-18

A Dwindling Rural Population with Increasing Responsibility [125KB] Sep-17

Slower Yields and Other Benefits of Organic Agriculture [87KB] Mar-17

Science Applied to Organic Agriculture Helps All Farmers [82KB] Feb-17

All for the sake of long, skinny, white fries [248KB] Jan-17

Is Childcare the New Measure of Successful Ag Conferences? [84KB] Dec-16

Withhold Hate and Fear and Expect Justice [85KB] Nov-16

Choosing to Unwrap Special Gifts [131KB] Oct-16

There's No Such Place as Away [134KB] Sep-16

Cover Crops Contribute to Soil Health [41KB] Aug-16

Societal Support for Soil Health [81KB] Jul-16

This Land is Our Backyard [84KB] Jun-16

Horses in the River [24KB] May-16

Social License [21KB] Mar-16

Back to Earth [22KB] Jan-16

Choices with Giving and Receiving Gifts [21KB] Dec-15

Appreciating Rather than Avoiding Life's Pauses [20KB] Nov-15

Should We Leave Climate Change to Scientists Alone [21KB] Oct-15

To Conserve is to Bet on the Long Term [21KB] Sep-15

Must Human Resources Be Wasted Too [88KB] Aug-15

Well-Intentioned People Risking Political Engagement [267KB] May-15 

Are Canadian Arms Exports A Good Value Proposition [72KB] Apr-15

University Education and Value for Students and Society [37KB] Mar-15

How Much Space Do We Need [37KB] Feb-15

Replacing Greenbelts with Green Dots [38KB] Jan-15

Blanketing a Watershed in Deep Topsoil, in a Decade [39KB] Dec-14

Our place in the long term [38KB] Nov-14

Innovations and contributions from the fringe [38KB] Oct-14

Advantages of Rising Food Prices [38 KB] Sep-14

Food Before Feed, Fuel, Fun and Bio-products [38 KB] Aug-14

Vision for a Hunger-Free Ontario, ON [38 KB] Jul-14

Is IJC Land More Sacred than Other Land [22 KB] Jun-2014

Music to Know More Deeply [20 KB] May-14

Awake to Present and Future Challenges [22 KB] Apr-14

Advertising, spending our money, to persuade us to buy more [22 KB] Mar-14

Beyond Diversion of Waste to Reduction [20 KB] Feb-14

Materialism and Capturing Joy [38 KB] Jan-14

In Rushing to Defend, What is the End [39 KB] December 2013

Efficiency is Only One Part of the Solution [38 KB] Nov-13

Proportional Representation and Evidence [19 KB] Oct-13

Brittle Agricultural Systems May Break [23KB] Sep-13

The Merchant of Venice as a Call to Heal [23 KB] Aug-13

Getting Back to a Resilient Normal  [22 KB] Jul-13

Dynamic Stability: A Means to No End [22 KB] Jun-13

Organic Options Keep Growing [22 KB] May-13

Climate Change as a Wake-up Call [22 KB] Apr-13

Storied Wisdom of Stompin' Tom and Stetson Gene [21 KB] Mar-13

Conversations on the way to Conservation [21 KB] Feb-13

From Rural and Urban Solitudes to a Great Swallowing [21 KB] Jan-13

Recovering Redundancy in a Just-in-Time World [22 KB] Dec-12

Land prices and the real value of farmland [19.5 KB] Nov-12

Service with compassion, grace and excellence [19.2 KB] Oct-12

The joy and common sense of gleaning [20.1 KB] Sep-12

Where have the young farmers gone [20.4 KB] Jul-12

Cell phones can make a difference [19.8 KB] Jun-12

Washing Vegetables [19.5 KB] May-12

Good fences can make for good farming [20.3 KB] Apr-12

Real food and YEEPies bringing it to market [20.0 KB] Mar-12

Treating our land as a family member [22.2 KB] Feb-12

Earth's story is longer, grander than our human story [20.1 KB] Feb-12

A life of happy frugality may be worth pursuing [20.4 KB] Jan-12

The Role of Canadian Consumers in the Food Equation [18.7 KB] Dec-11

Seeing waste and ourselves differently [18.8 KB] Nov-11

Today's youth will still be here in 2050 [21.1 KB] Oct-11

Our affluent society is too ready to waste food [17.8 KB] Sep-11