Professor - Plant Nutrition
Office: Agricultural and Life Science 3045
Phone: 541-737-5714
Fax: 541-737-5725
E-Mail: 
Department Website: Department of Crop and Soil Science
Vita: Short
Current Work Focus: Responsibilities include nutrient management extension programs for Oregon. Research interests include fertilizer efficiency, plant tissue monitoring and prediction of spring N rate for cool season grass seed production.
Projects: 
Publications:
Proceedings
Hart, J. and B. Strik. 2007. Nutrient questions to think about - An introduction to the new nutrient management guide for blueberries. In: OSU Blueberry Growers' Course Proceedings, pp. 89-92.
Gislum, R., P. Rolston, J.M. Hart, R. Chynoweth, B. McCloy, and W.C. Young III. 2007. Economical optimal nitrogen (ECO-N) application rate is all that matters for the growers. In: Proc. Sixth Int'l. Herbage Seed Conference (Seed Production in the Northern Light), T.S. Aamlid, L.T. Havstad and B. Boelt (eds.), June 18-20, 2007, Gjennestad, Norway.
Hart, J.M., P. Rolston, M.E. Mellbye, T.B. Silberstein, W.C. Young III, B.L. McCloy, G.A. Gingrich, N.W. Christensen, and R. Gislum. 2007. Comparison of soil N tests for prediction of spring N rate in perennial ryegrass seed production. In: Proc. Sixth Int'l. Herbage Seed Conference (Seed Production in the Northern Light), T.S. Aamlid, L.T. Havstad and B. Boelt (eds.), June 18-20, 2007, Gjennestad, Norway.
Hart, J., C. Landgren, R. Fletcher, and M. Bondi. 2007. Seasonal change in Noble fir, Douglas-fir, Grand fir, Turkish fir, and Nordmann fir needle nutrient concentration. In: Proc. Eighth International Christmas Tree Research and Extension Conference, Bogense, Denmark August 2007.
Research Reports
Hart, J., M. Mellbye, G. Gingrich, T. Silberstein, and W.C. Young III. 2006. Evaluation of the use of the N mineralization test to refine spring nitrogen rates for western Oregon grass seed production. Final Report for 2005-2006 to the Agricultural Research Foundation, November 30, 2006.
Hart, J., C. Landgren, R. Fletcher, and M. Bondi. 2007. To affirm or modify recommended needle sampling time. Final Report to ODA/ARF.
Newsletters
Hart, J. and A. Poole. 2008. Money saving ideas to reduce potassium fertilizer cost for cranberry production. Wisconsin Cranberry Crop Management Newsletter, Volume XX, No. 9, September 5, 2008.
Hart, J., M. Mellbye, and N. Christensen. 2008. The phosphorus diet for grass seed fields. Update, Linn County Extension Association. Volume XXVIII No.11, November, 2008.
Hart, J. 2008. Reducing potassium fertilizer cost for grass seed production in western Oregon. Crop and Soil News and Notes. November 2008 Volume 22, Number 6.
Hart, J. 2008. Money saving ideas to reduce potassium fertilizer cost for cranberry production. South Coast Grower News. December 2008 Volume 2, Issue 4.
Abstracts
Downing, T. and J. Hart. 2007. The economics of liming coastal dairy pastures. J. Dairy Sci. Vol. 90, Supp. 1, abstract M102. American Dairy Science Annual Meeting, San Antonio, TX.
White, L., J. Hart, and B. Strik. 2007. Renovating cranberry beds in Oregon. The North American Cranberry Research and Extension Workers Conference, October 1-3, 2007, Egg Harbor City, NJ.
Hart, J., B. Strik, and T. Roper. 2007. The influence of nitrogen nutrition on cranberry yield components. The North American Cranberry Research and Extension Workers Conference, October 1-3, 2007, Egg Harbor City, NJ.
Flowers, M.D., J.M. Hart, W.C. Young III, N. W. Christensen, C.J. Garbicik, M.E. Mellbye, T.B. Silberstein, and G.A. Gingrich. 2008. Exploring remote sensing applications in perennial ryegrass seed production. American Society of Agronomy meeting, Houston, TX, October, 2008.
Extension Publications
Hart, J.M., N.W. Christensen, M.E. Mellbye, and M.D. Flowers. 2006. Using the nitrogen mineralization soil test to predict spring fertilizer N rate (soft white winter wheat grown in western Oregon). Oregon State Univ. Ext. Serv. FS 334-E, Corvallis.
Hart, J., B. Strik, and H. Rempel. 2006. Caneberries. Oregon State Univ. Ext. Serv. EM 8903-E, Corvallis.
Locke, K., D. Horneck, J. Hart, and R. Stevens. 2006. Acidifying soil in landscapes and gardens east of the Cascades. Oregon State Univ. Ext. Serv. EC 1585-E, Corvallis.
Horneck, D., D. Wysocki, B. Hopkins, J. Hart, and R. Stevens. 2006. Acidifying soil for crop production east of the Cascades. Oregon State Univ. Ext. Serv. EM 8917-E, Corvallis.
Hart, J., B. Strik, L. White, and W. Yang. 2006. Nutrient management for blueberries in Oregon. Oregon State Univ. Ext. Serv. EM 8918, Corvallis.
Hart, J.M., M.E. Mellbye, T.B. Silberstein, W.C. Young III, G.A. Gingrich, S. Aldrich-Markham, and T.W. Tompson. 2006. Evaluation of the nitrogen mineralization soil test to refine spring nitrogen rate determination in western Oregon grass seed production. In: W.C. Young III (ed.), 2005 Seed Production Research at Oregon State University USDA-ARS Cooperating, Department of Crop and Soil Science Ext/CrS 125 pgs 14 to 19, 4/06, Corvallis, OR.
Hart, J., M. Mellbye, T. Silberstein, W.C. Young III, N. Christensen, and C. Garbacik. 2007. Evaluation of the N mineralization test to refine spring nitrogen rate for western Oregon grass seed production in 2006. In: W.C. Young III (ed.), 2006 Seed Production Research at Oregon State University USDA-ARS Cooperating, Department of Crop and Soil Science Ext/CrS 126, 4/07, Corvallis, OR.
Downing, T., J. Hart, D. Sullivan, and M. Gamroth. Revised July 2007. Manure application rates for forage production. Oregon State Univ. Ext. Serv. EM 8585-E, Corvallis, OR.
Hart, J. 2007. Commercial red raspberry production in the Pacific Northwest. In: Dan Barney, (ed.), PNW 598. 108 pp. (Article in the nutrition section.)
Flowers, M.D., J. M. Hart, W.C. Young III, N.W. Christensen, C.J. Garbicik, M.E. Mellbye, T.B. Silberstein, and G.A. Gingrich. 2008. Exploring remote sensing applications in perennial ryegrass seed production In: W.C. Young III (ed.), 2007 Seed Production Research at Oregon State University USDA-ARS Cooperating, Department of Crop and Soil Science Ext/CrS 127 pgs 1 to11, 3/08, Corvallis, OR.
Christensen, N.W. and J.M. Hart. Revised 2008. Combating take-all of winter wheat in western Oregon. Oregon State Univ. Ext. Serv. EC 1423-e, Corvallis, OR.
"Nitrogen facts for perennial ryegrass seed production for western Oregon." Grass seed seminar for growers and field representatives in Albany, OR, February 19, 2008 and Salem, OR. February 25, 2008.
"Predicting N rate for perennial ryegrass seed production" at Hyslop Farm Field Day, May 28, 2008. Lewisburg, OR. (Presented twice.)
"Optimizing nitrogen fertilizer application" at the Pacific Northwest Christmas Tree Association Summer Meeting in Corvallis, OR. June 20, 2008.
"Nutrients leaving a cranberry bed" at the Cranberry Farm Science Review, Sea Winds Farms, Langlois, OR. August 28, 2008.
"Fall and winter nutrient considerations for soft white winter wheat production for western Oregon" at the fall wheat production meetings at Linn County Fair and Expo. Center (September 2) and at NWREC and Forest Grove (September 3, 2008).
"Fertilizer recommendation approaches and economics" at the 35th Annual Hermiston Farm Fair and Trade Show, Hermiston, OR. December 3, 2008.
"Fifty nifty nutrient nuggets for forage management" at forage training session during Extension Outreach and Engagement Conference, Corvallis, OR. December 4, 2008.
"Soil primer for saving $$$ on potassium fertilizer" at Oregon Seed Growers League annual meeting, Salem, OR. December 8, 2008.
"Spring nutrient management for soft white winter wheat production in western Oregon." Wheat production meeting (Part II) for growers and field representatives, Albany, OR (January 13, 2009), Rickreall and Forest Grove, OR (January 15, 2009).
News & Notes
Hart, J. 2007. Sheep, kiwis, perennial ryegrass and spring nitrogen fertilizer application. Crop and Soils News and Notes, January 2007 Volume 21 Number 1.
Hart, J., N. Christensen, D. Sullivan, D. Horneck, and G. Pirelli. 2007. Soil test results and sampling depth. Crop and Soils News and Notes, March 2007 Volume 21 Number 2.
Hart, J., N. Christensen, D. Sullivan, D. Horneck, and G. Pirelli. 2007. Phosphorus and potassium soil test results and sampling depth, part 2. Crop and Soils News and Notes, July 2007 Volume 21 Number 4.
Hart, J., N. Christensen, and D. Sullivan. 2007. The fallacy of using soil cation ratios for nutrient recommendations. Crop and Soils News and Notes, November 2007, Vol. 21, No. 6.
Hart, J., C. Landgren and R. Fletcher. 2008. Needle or tissue sampling for Douglas-fir and noble fir Christmas tree production in western Oregon. Crop and Soil News and Notes, January 2008 Volume 22, Number 1.
Hart, J., M. Mellbye, and B. Young. 2008. Revisiting nutrient amount and value in grass straw. Crop and Soil News and Notes, May 2008 Volume 22, Number 3.
Hart, J. and N. Christensen. 2008. Report cards, bull's-eyes, and nutrients in wheat straw - nutrient management considerations as wheat is harvested in western Oregon. Crop and Soil News and Notes, July 2008 Volume 22, Number 4.
Hart, J., M. Mellbye, and N. Christensen. 2008. Reducing phosphorus cost for grass seed production. Crop and Soil News and Notes, September 2008 Volume 22, Number 5.
Hart, John, Tom Silberstein and Neil Christensen. 2009. Update of Nmin Soil Test for Predicting N Fertilizer Needs for Winter Wheat. Crop and Soil News and Notes, January 2009 Volume 23, Number 1.
Hart, J. 2006. Christmas tree nutrient sampling. Christmas Tree Lookout, Fall 2006, p. 39-40. Pacific Northwest Christmas Tree Association.
Hart, J., C. Landgren, and J. O'Donnell. 2007. Evaluating Christmas tree nutrient needs. American Christmas Tree Journal 51(4):14-15.
Hart, J., C. Landgren, R. Fletcher, and M. Bondi. 2007. Winter is the new season for needle sampling. Christmas Tree Lookout, Fall 2007, p. 23-26. Pacific Northwest Christmas Tree Association.
Peters, A. and J. Hart. 2007. Temperature-based fertilization for early forage production in Southwestern Oregon, using the T-sum 200 method. Online. Forage and Grazinglands doi:10.1094/FG-2007-086-01-BR.
Hart, J., C. Landgren, and R. Fletcher. 2008. Fall nitrogen fertilization of noble fir. In "Lookout" magazine for the Pacific Northwest Christmas Tree Grower Association.
