About me 2

Journal Publications

Roberts, G.L. and M.J. Tsujita. 1990. Photoperiodic Response of Sisyrinchium bermudiana L.- A Possible New Bedding Plant. Acta Hortic. 272:129-131.

Roberts, G.L. and M.J. Tsujita. 1992. Inductive Cycles Required for Flowering in Sisyrinchium bermudiana L. HortScience 27:80.

Roberts, G.L. and M.J. Tsujita. 1992. Floral Initiation and Development in Sisyrinchium bermudiana L. HortScience 27:73-74.

Roberts, G.L. and M.J. Tsujita. 1993. Light Quality Affects Bud Break, Yield and Post Harvest Quality of Cut Roses. HortScience 28(6):621-622.

Roberts, G.L. and M.J. Tsujita. 1995. Far-red End of Day and Reduced Irradiance Affect Plant Height of Easter and Asiatic Lilies. HortScience 30(5):1009-1012.

Conference Presentations

Roberts, G.L., M.J. Tsujita and J. Gerrath. 1991. Floral induction in Sisyrinchium bermudiana L. Proceedings of the 88th Annual Meeting of ASHS, Pennsylvania, USA. HortScience 26(6):719. (Abst.)

Roberts, G.L. and M.J. Tsujita. 1992. Red to far-red ratio in high pressure sodium lights affects yield in roses. Proceedings of the 89th Annual Meeting of ASHS, Hawaii, USA. HortScience 27(6):649. (Abst.)

Roberts, G.L., M.J. Tsujita and T. Blom. 1994. Far-red light reverses growth regulating action of negative DIF. Proceedings of the 91st Annual Meeting of ASHS, Oregon, USA. HortScience 29(5):487. (Abst.)

Blom T.J., M.J. Tsujita and G.L. Roberts. 1994. Influence of photoperiod and light intensity on plant height of Lillium longiflorum Thunb. Proceedings of the 91st Annual Meeting of ASHS, Oregon, USA. HortScience 29(5):542. (Abst.)

Tsujita, M.J and G.L. Roberts 1995. Nutrient uptake and growth of roses in recirculating and non-recirculating systems University of Guelph, Dept. of Horticultural Sciences, Guelph Ontario.

Roberts, G.L. 1995. Nutrient uptake and growth of roses in recirculating and nonrecirculating systems. HortScience 30(4):857 (Abst.)

Roberts, G.L. 1996. Monitoring root exudates in solution cultured roses. 88th Annual Meeting American Society of Agronomy.

Roberts, G.L. 1997. Evaluating and Dealing with Greenhouse Effluent. Proceedings of the 24th Annual Aquatic Toxicity Workshop. Niagara Falls, Ontario, Oct. 20-22. p.70.

Edwards, D.R., G.L. Roberts and M.A. Dixon. 1997. Monitoring Fertigation Practices in two Ontario greenhouses. Proceedings of 24th annual Aquatic Toxicity Workshop. Niagara Falls, Ontario, Oct. 20-22. p.70.

Roberts, G.L., M.A. Dixon and T. Graham. 1997. Monitoring greenhouse effluents in surrounding surface water features and determining its usefulness for irrigation.

Influence of High Salt in the Nutrient Solution on the Net Carbon Exchange Rate of Roses. 1998. Annual Meeting
of the Canadian Society of Horticultural Science.

Roberts, G.L. 1999. High salinity affects photosynthesis of cut roses. Proceedings of Annual General Meeting of CSHS, UPIE, Prince Edward Island, Canada.

Selected Articles and Unrefereed Publications

Roberts, G.L. 1992. Clay aggregates successful substrate for hydroponic crops. The Grower vol. 42 #7.

Roberts, G.L. and M.J. Tsujita. 1993. Greenhouse Flower and Vegetable Crop Production - A Production Handbook. Self published.

Roberts, G.L. 1994. Understanding light quality and its effects on plant architecture. The Grower vol. 44 #1

M.J. Tsujita and G.L. Roberts, 1995. Influence of high chloride concentrations in rose production in recirculating systems. Roses Inc Bull. Sept. 1995.

Dixon, M.A., B. Grodzinski, M.J. Tsujita, T. Blom, Glenn Roberts. 1996. The Influence of High Chloride Salts on Solution Cultured Roses. Roses Inc. Bull. Sept. 1996.

Dixon, M.A., G.L. Roberts, and D.R. Edwards. 1995. Closed circuit nutrient recycling for greenhouse crops. Final report: Toxics Prevention Division, Environment Protection Branch-Ont. Reg., Environment Canada. Volume 1.

Dixon, M.A., G.L. Roberts, and D.R. Edwards. 1996. Closed circuit nutrient recycling for greenhouse crops. Final report: Toxics Prevention Division, Environment Protection Branch-Ont. Reg., Environment Canada. Volume 2.

Dixon, M.A., G.L. Roberts, and D.R. Edwards. 1997. Closed circuit nutrient recycling for greenhouse crops. Final report for Toxics Prevention Division, Environment Protection Branch-Ontario Region, Environment Canada. Volume 3. Requisition KE409-4-1556-2. 55pp.

Grodzinski, B.G., G. Cloutier, D. Edwards, G. Roberts, M. Tu and W. Zhang. 1997. Achieving closure of Nutrient delivery systems for greenhouse crops: a problem worthy of a solution. Greenhouse Canada. Oct. Pp. 91-95.