Dr. David Barker

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Profile

Dr. David Barker

Professor

60% Research; 0% Extension; 40% Teaching

barker.169@osu.edu

(614) 247-6258

Office:

226 Kottman Hall

Professional Information

Degrees & Credentials:

BAgSc, 1980, Massey University, Palmerston North, New Zealand

MAgSc, 1983, Massey University, Palmerston North, New Zealand

PhD, 1990, University of Nebraska, Lincoln NE

Research Area(s):

Forage Crop Physiology & Ecology

Grazing Systems Management

Gompertz Growth Models and their use for pasture management

Direct seeding for mine reclamation

Arundo as a biofuel crop

Application of Biodiversity Theory to Species Mixtures for Grazing

Population Stability in Endophyte-free Novel-endophyte Tall Fescue Pastures

The Measurement of Intra-species Diversity and its Influence on Forage Biomass Characteristics

Pasture Species Mixtures For Sustainable Forage Production Under Grazing

Survey of endophyte in perennial ryegrass in Ohio

Interests & Expertise:

Production and performance of forages within grazing systems

Biodiversity effects (species and population composition) on forage production and performance

Drought effects on forage production and performance

Biography:

POSITIONS HELD

Year	Position	Institution
2012 - present 2006-2012 2000-2006	Professor and Associate Chair (Interim) Associate Professor Assistant Professor	The Ohio State University
1985-2000	Senior Scientist	New Zealand Pastoral Agriculture Research Institute Ltd. (AgResearch), New Zealand
1982-1992	Scientist	Grasslands Division, Dept Scientific and Industrial Research (DSIR), New Zealand

AREAS OF RESPONSIBILITY IN EXTENSION, RESEARCH, TEACHING

My goal is to establish a nationally and internationally recognized research program in forage crop physiology and management (60% research appointment). Associated with this goal is the aim of improving cropping and utilization systems in an environmentally-sensitive and ecologically-compatible manner. I also teach undergraduate and graduate-level courses on forage production and utilization (40% teaching appointment), and assist in development of interdisciplinary courses with other faculty. In collaboration with interdisciplinary teams, my research encompasses new cropping systems options to solve existing problems using a broad-based systems approach. I advise undergraduate and graduate students, publish in technical and refereed journals, present research results at scientific conferences, and secure extramural funding. I conduct outreach through participation in the Integrated Forage Management Team of Ohio State University Extension, interaction with industry representatives and associations to disseminate research-based information, and collaboration with other academic and professional institutions.

COURSES TAUGHT

Course	Title	Credit Hrs	Last taught
HCS 2201	Ecology of Managed Plant Systems	4	Autumn 2012
HCS200	Crop Science	5 (qtrs.)	Spring 2007
HCS 5412	Forages, Grasslands and Prairies	3	Autumn 2012
HCS412	Forage Crops	3 (qtrs.)	Spring 2012
HCS612	Principles of Grassland Management	5	Autumn 2011
HCS604.1	Experimental Approaches in Plant Physiology I. Whole Plants	4	Autumn 2007
HCS806	Methods in Plant Science	2	Autumn 2009
HCS830	Current Topics in Forage Crop Science	2	Winter 2008
HCS602	Crop Ecology	3	Winter 2008

GRADUATE ADVISING

PhD - current	2
PhD - completed	1
MS - current	1
MS - completed	5
additional graduate committees	13

Works

Journal Articles

Arnold, A.M.; Albrecht, K.A.; Barker, D.J.; Sulc, R.M., "Predictive equations for alfalfa quality (PEAQ) can be used with reduced-lignin alfalfa" Crop, Forage and Turfgrass Management 5 1 (2019)

Alexander J. Lindsey, Peter R. Thomison, David J. Barker, and James D. Metzger, "Evaluating water exclusion using plastic ground cover in maize at two population densities." Agronomy Journal 109 (2017) 1-9-1-9

Alexander J. Lindsey, Peter R. Thomison, David J. Barker and Robert W. Mullen, "Drought-Tolerant Corn Hybrid Response to Nitrogen Application Rate in Ohio." Crop, Forage & Turfgrass Management 1 (2015) 1-8-1-8

Nave, R.L.G., R.M. Sulc, D.J. Barker and N. St-Pierre, "Changes in Forage Nutritive Value among Vertical Strata of a Cool-Season Grass Canopy." Crop Science 54 (2014) 2837-2845-2837-2845

Nave, R.L.G., R.M. Sulc, D.J. Barker and N. St-Pierre, "Changes in Forage Nutritive Value among Vertical Strata of a Cool-Season Grass Canopy." Crop Sci 54 (2014) 2837-2845-2837-2845

Nave, R.L.G., R.M. Sulc, and D.J. Barker, "Relationships of forage nutritive value to cool-season grass canopy characteristics" Crop Science 53 1 (2013) 341-348-341-348

F.P. Ferraro, R.M. Sulc, R. L.G. Nave, and D.J. Barker, "Seasonal variation in the rising plate meter calibration forforage mass" Agronomy Journal 104 1 (2012) 1-6-1-6

L.B. Owens, D.J. Barker, S.C. Loerch, M.J. Shipitalo, J.V. Bonta, and R.M. Sulc, "Nitrate inputs and losses by surface runoff and subsurface leaching for pastures managed by continuous or rotational stocking" Journal of Environmental Quality 41 (2012) 106-113-106-113

Barker,David,J; Ferraro,Fernanda,P; Nave,Renata,La Guardia; Sulc,R,Mark; Lopes,Fernanda; Albrecht,Kenneth,A, "Analysis of Herbage Mass and Herbage Accumulation Rate Using Gompertz Equations" Agronomy Journal 102 3 (2010) 849-857-849-857

Liu, J; D.J. Barker, R.M. Sulc, J.C. Jang, and G.L. Wang, "Quantifying the proportion of perennial ryegrass cultivars in intra-species mixtures using simple sequence repeat (SSR) and inter-SSR (ISSR) markers, and discriminant analysis" New Zealand journal of agricultural research 53 (2010) 215-226-215-226

Barker, D.J., F.P. Ferraro, R. La Guardia Nave, R.M. Sulc, F. Lopes, K.A. Albrecht., "Analysis of herbage mass and herbage accumulation rate using Gompertz equations." Agronomy Journal 102 (2010) 849-857-849-857

Liu,J; Barker,D,J; Sulc,R,M; Jang,J,C; Wang,G,L, "Quantifying the proportion of perennial ryegrass cultivars in intra-species mixtures using simple sequence repeat (SSR) and inter-SSR (ISSR) markers and discriminant analysis" NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH 53 3 (2010) 215-226-215-226

Faé, G.S., R.M. Sulc, D.J. Barker, R.P. Dick, M.L. Eastridge, and N. Lorenz., "Integrating winter annual forages into a no-till corn silage system." Agronomy Journal 101 (2009) 1286-1296-1286-1296

Zahreddine, H.G., D. J. Barker, M. F. Quigley, K. Sleem and D. K. Struve, "Patterns of woody species diversity in Lebanon as affected by climatic and soil properties." Lebanese Science Journal 8 (2007) 21-44-21-44

McCormick, J.S., R.M, Sulc, D.J. Barker, and J.E. Beuerlein., "Yield and nutritive value of autumn-seeded winter-hardy and winter-sensitive annual forages" Crop Sci. 46 (2006) 1981-1989-1981-1989

Barker, D. J.; Sulc, R. M.; Bultemeier, T. L.; McCormick, J. S.; Little, R.; Penrose, C. D.; Samples, D., "Contrasting toxic-endophyte contamination between endophyte-free and nontoxic-endophyte tall fescue pastures" Crop Science 45 2 (2005) 616-625-616-625

Brenly-Bultemeier, T.L.; Barker, D.J.; Sulc, R.M.; Harrison, S.K.; Regnier, E.E., "Species interactions with quackgrass and their effects on forage production" Crop Science 45 1 (2005) 290-296-290-296

K. Louie, G.C. Wake, M.G. Lambert, A.D. MacKay, D.J. Barker., "A delay model for the growth of ryegrass-clover mixtures: Formulation and preliminary simulations." Ecological Modelling 155 (2001) 29-40-29-40

Betteridge,K; Mackay,A,D; Shepherd,T,G; Barker,D,J; Budding,P,J; Devantier,B,P; Costall,D,A, "Effect of cattle and sheep treading on surface configuration of a sedimentary hill soil" AUSTRALIAN JOURNAL OF SOIL RESEARCH 37 4 (1999) 743-760-743-760

Barker, D.J., "Please update record with Title" Field Crops Research 38 (1994) 122-123-122-123

Barker, D. J.; Zhang, D. M.; Mackay, A. D., "Root distribution in a low fertility hill country sward grazed by sheep - a short communication." New Zealand journal of experimental agriculture 16 (1988) 73-76-73-76

Chapters

"Chapter 11: Conducting On-Farm Research" In Ohio Agronomy Guide, 15th Edition. Edited by Lindsey, L.E.; Thomison, P.R.. 2017.

"Forage and Biomass Planting. Chapter 2" In Conservation Outcomes from Pasture and Hayland Practices: Assessment, Recommendations and Knowledge Gaps. Edited by C.J. Nelson. 2012.

"Forage crops and rangeland" In Plant Science: Growth, Development, and Utilization of Cultivated Plants. Edited by M.J. McMahon, A.M Kofranek, and V.E. Rubatzky. 2011.

"Measuring endophyte in tall fescue - plants, fields and farms." In Chapter 15 in “Tall Fescue for the 21st Century”. Edited by H. Frieburg, D.B. Hannaway, C.P. West. 2009.

"Plant nutrient and water interactions" In Forages: Volume II. The Science of Grassland Agriculture. Edited by R.F Barnes, C.J. Nelson, M. Collins and K.J. Moore. 2007.

"Forage crops and rangeland" In Hartmann's Plant Science: Growth, Development, and Utilization of Cultivated Plants. Edited by M.J. McMahon, A.M Kofranek, and V.E. Rubatzky. 2007.

"Forage fertilization and nutrient management" In Forages: Volume I. An Introduction to Grassland Agriculture. Edited by R.F Barnes, C.J. Nelson, M. Collins and K.J. Moore. 2003.

"Establishing and managing improved plants in hill country" In Using and managing improved plants in hill country. Edited by R.E. Burgess and J.L. Brock. 1985.

Conferences

Nave, RLG; R. M. Sulc, D. J. Barker, "Forage nutritive value changes in a stratified canopy of a mixed cool-season grass sward affected by season." XXII International Grassland Congress 2013.

Barker, D.J. Sparks, P.M., "Running Buffalo clover - Lost, Forgotten, or Overlooked?" Am. Forage and Grassl. Council 2013.

D.J. Barker, R.M. Sulc, R. La Guardia Nave, and F.P. Ferraro, "Use of pasture mass as a predictor of herbage accumulation rate, and some implications for pasture management" Proceedings of the American Forage and Grassland Council [CD-ROM Computer File #2]. AFGC, Elmhurst, IL. 2011.

M.B. Dodd, J.R. Crush, A.D. Mackay, D. Barker, "The â€˜rootâ€™ to more soil carbon under pastures" New Zealand Grassland Association 2011.

D.J. Barker, "The long and short of Grazing: pre-graze and post-graze targets." 9th Heart of America Grazing Conference 2010.

Ferraro, F.P., R.M. Sulc, D.J. Barker, R. La Guardia Nave, F. Lopes, and K.A. Albrecht., "Seasonal effects on rising plate meter calibration for forage" Proceeding of the American Forage and Grassland Council [CD-ROM Computer File #35]. AFGC, Elmhurst, IL. 2009.

D.J. Barker, F.P. Ferraro, W.S. Klooster, R. La-Guardia-Nave, S. Short, and S.L. Wedryck, "Spatial patterns in grassland at local and landscape scales" Proceedings of the American Forage and Grassland Council. [CD-ROM Computer File #78]. AFGC, Elmhurst, IL. 2009.

Diedrick, K.A., Sulc, R.M., Barker, D.J., and McCormick, J.S., "Field performance of alfalfa cultivars selected for resistance to lodging and fast recovery after harvest." Proceedings of the American Forage and Grassland Council 2007.

Brown, C.L.; D.J. Barker, B.K. Slater, "Spatial variation of endophyte distribution in beef and dairy cattle pasture" Proceedings of the American Forage and Grassland Council 2007.

Fae, G.S., R.M. Sulc, D.J. Barker, R.K. Dick, and M.L. Eastridge, "Changes in soil carbon and soil physical properties in an integrated crop-livestock system" Proceedings of the International Symposium on Integrated Crop-Livestock Systems 2007.

Hensler, A.L., D.J. Barker, R.M. Sulc, S.C. Loerch, and L.B. Owens, "Comparison of management intensive and continuous grazing in beef cattle pasture" Proceedings of the American Forage and Grassland Council 2007.

Barker, D.J., R.M. Sulc, M.R. Burgess, T.L. Bultemeier, "Species richness affects grassland yield and yield stability across seasons, sites and years" Pastoral Systems in Marginal Environments. Proceedings of a Satellite Workshop of the XXth International Grassland Congress 2005.

Barker, D.J., R. Little, D. Samples, C.D. Penrose, R.M. Sulc, J.S. McCormick, T.L. Bultemeier, M.R. Burgess., "Comparative lamb and heifer growth rates on non-toxic and endophyte-free tall fescue" Proceedings of the American Forage and Grassland Council 2005.

McCormick, J.S., R.M. Sulc, D.J. Barker, J.E. Beuerlein and L.H Rhodes, "Forage yield and quality of winter-hardy cereals and winter-sensitive species for grazing" Proceedings of the American Forage and Grassland Council 2004.

Burgess, M.R., D.J. Barker, D.A. Mangione, R.M. Sulc, S.K. Harrison and D.L. Zartman., "Financial analysis of three pasture types for meat goat production from grazing." Proceedings of the American Forage and Grassland Council 2004.

Dodd, M.B.; D.J. Barker; M.E. Wedderburn, "Practical benefits of pasture diversity in hill country" Proceedings of the New Zealand Grassland Association 2003.

Burgess, M.R.; D.J. Barker, D.L. Zartman, R.M. Sulc, and S.K. Harrison, "Forage species and spatial effects on the dietary intake of goats" Proceedings of the American Forage and Grassland Council 2003.

Lambert, M.G.; A.D. Mackay, B.P. Devantier, D.B. McDougall, Barker, D.J., and Z. Park Ng, "Redefining the production potential of hill pastures using fertiliser nitrogen." Proceedings of the New Zealand Grassland Association 2003.

Bultemeier, T.L.; D.J. Barker, R.M. Sulc, S.K. Harrison, and E.E. Regnier., "Quackgrass contribution to production of pasture mixtures under grazing" Proceedings of the American Forage and Grassland Council 2003.

Barker, D.J.; R.M. Sulc, A. Deak, M.H. Hall, M.A. Sanderson, and T.L. Bultemeier, "Performance of pastures with high and low species richness in northeast USA." Proceedings of the American Forage and Grassland Council 2003.

Dodd, M.B., Barker, D.J.; Dymock, N.; and Orr, S.J., "Factors influencing the contribution of narrow-leaved plantain to North Island hill country pastures" Proceedings of the New Zealand Grassland Association 2000.

Barker, D.J.; Sheppard, D.G.; Mackay, A.D.; Dymock, N., "Hill Country Farm Investment Options – cocksfoot pasture vs. superphosphate" Proceedings of the New Zealand Grassland Association 1999.

Mackay, A.D.; Lambert, M.G.; Barker, D.J., "Effect of intensification of livestock farming on the physical properties of a hill soil" Proceedings of the 1999 Fertiliser and Lime Research Center Conference 1999.

Kemp, P.D.; Barker, D.J.; Valentine, I.; Awan, M.H.; Nie, Z.N., "Oversowing legumes into perennial pasture: can we do it better?" Proceedings of the 9th Australian Agronomy Conference 1998.

Nicholas, P.K.; Kemp, P.D.; Barker, D.J., "Biodiversity, stability and pasture management - the role of functional groups" Proceedings of the 9th Australian Agronomy Conference 1998.

Barker, D.J.; Clark, D. A.; Thom, E.; Couchman, J.; Burton, R.; Dymock, N., "Pasture species and drought impacts on milk yield 2) Predicted farm milk yield at four sites." Proceedings of the New Zealand Grassland Association 1998.

Nie, Z.N.; Valentine, I.; Barker, D.J.; Mackay, A.D.; Hodgson, J., "Impact of a pastoral fallow on the morphology and growth of white clover (Trifolium repens L.) in a New Zealand hill pasture" Proceedings of the XVIII International Grassland Congress 1997.

Nicholas, P.K.; Kemp, P.D.; Barker, D.J.; Brock, J.L.; Grant, D.A., "Production, stability and biodiversity of North Island New Zealand hill pastures" Proceedings of the XVIII International Grassland Congress 1997.

Barker, D.J.; Dymock, N., "The interaction between root distribution and pasture production during water deficit" Proceedings of the XVIII International Grassland Congress 1997.

Awan, M.H.; Kemp, P.D.; Barker, D.J.; Choudhary, M.A., "Development and fate of three temperate legumes following oversowing." Proceedings of the XVIII International Grassland Congress. 1997.

Assuero,S,G; Mazzanti,A; Barker,D; Matthew,C; KEMP,P, "Non-response of reducing and fructosyl sugar concentrations in tall fescue during water deficit" 27th Annual Conference of the Agronomy Society of New Zealand/NZIAS/NZSHS 1997.

Assuero, S.; Mazzanti, A.; Barker, D.J.; Matthew, C, "Reducing and fructosyl sugar contents of two contrasting tall fescue cultivars in response to water stress" Proceedings of the Agronomy Society of New Zealand 1997.

Hyslop, M.G.; Kemp, P.D.; Barker, D.J.; Hodgson, J., "The incidence of nodal rooting and plantlet survival in spreading red clover (Trifolium pratense L.)" Proceedings of the New Zealand Grassland Association 1996.

Lambert, M.G.; Barker, D.J.; Mackay, A.D.; Springett, J.A., "Biophysical indicators of sustainability of North Island hill pasture systems" Proceedings of the New Zealand Grassland Association 1996.

Faulalo, K.; Hedley, M.J.; del Pino Machado, A.S.; Mackay, A.D.; Barker D.J., "The development of a pasture growth model based on predicted evapotranspiration and soil fertility status." Proceedings of the Australian Soil Science Society 1996.

Nie, Z.N.; Valentine, I.; Mackay, A.D.; Barker, D.J.; Hodgson, J., "Long-term effects of pastoral fallowing on white clover (Trifolium repens L.) and grass growth in a hill pasture" Proceedings of the Joint Symposium - White clover: New Zealand’s competitive edge 1995.

Mir Hosseini Dehabadi, S.R., Kemp, P.D.; Barker, D.J.; Hodgson, J., "Physiological and morphological responses of lucerne to soil moisture stress" Proceedings of the International Symposium on Grassland Resources 1994.

Awan, M.H.; Kemp, P.D.; Choudhary, M.A.; Barker, D.J., "Pasture legume establishment from oversowing in drought-prone hill country" Proceedings of the New Zealand Grassland Association 1993.

Maclean, B.; Matthew, C.; Latch, G.C.M.; Barker, D.J., "The effect of endophyte on drought resistance in tall fescue." Proceedings of the Second International Symposium on Acremonium/Grass Interactions 1993.

Hume, D.E.; Popay, A.J.; Barker, D.J., "Effect of Acremonium endophyte on growth of ryegrass and tall fescue under varying levels of soil moisture and Argentine stem weevil attack." Proceedings of the Second International Symposium on Acremonium/Grass Interactions 1993.

Barker, D.J.; Baars, J.A., "Comparing the seasonal productivity of cocksfoot and resident pastures on hill country farms using a system-model" Proceedings of the New Zealand Grassland Association 1993.

Mir Hosseini Dehabadi, S.R., Kemp, P.D.; Barker, D.J.; Hodgson, J., "Adaptation of sainfoin cultivars and lucerne to water stress" Proceedings of the XVII International Grassland Congress 1993.

Barker, D.J.; Davies, E.; Lane, G.A.; Latch, G.C.M.; Nott, H.M.; Tapper, B.A., "Effect of water deficit on alkaloid concentrations in perennial ryegrass endophyte associations." Proceedings of the Second International Symposium on Acremonium/Grass Interactions 1993.

Barker, D.J.; Caradus, J.R.; McManus, M.T., "Physiological responses of white clover genotypes to water deficit." Proceedings of the XVII International Grassland Congress 1993.

Hume, D. E; Barker, D. J., "Natural reseeding of five grass species in summer dry hill country" Proceedings of the New Zealand Grassland Association 1991.

Mackay, A. D.; Tillman, R. W.; Parker, W. J.; Barker, D. J., "Effect of superphosphate, lime, and cocksfoot on summer dry hill country pasture production" Proceedings of the New Zealand Grassland Association 1990.

Stevens, D. R.; Turner, J. D.; Barker, D. J.; Moloney, S. C., "‘Grasslands Maru’ phalaris: productive and persistent in hill country" Proceedings of the New Zealand Grassland Association 1989.

Barker, D.J.; Chu, A.C.P.; Korte, C.J., "Ryegrass herbage yield components and their response to water deficit stress" Proceedings of the XVI International Grassland Congress 1989.

Sanders, P. M.; Barker, D. J., "Pasture plant identification using isozyme electrophoresis" Proceedings of the New Zealand Grassland Association 1988.

Barker, D. J.; Lancashire, J. A.; Meurk, C., "‘Grasslands Wana’ cocksfoot - An improved grass suitable for hill country" Proceedings of the New Zealand Grassland Association 1985.

Barker, D. J.; Chu, A. C. P.; Korte, C. J., "Some effects of spring defoliation and drought on perennial ryegrass swards" Proceedings of the New Zealand Grassland Association 1985.

Barker, D. J.; Chu, A. C. P., "Strategies for dryland pasture management – A review" Proceedings of the Agronomy Society of New Zealand 1985.

Presentations

"HCS Curriculum Revisions." In HCS Departmental Seminar Series. 2016.

"Impressions from Saudi Arabia." In HCS Departmental Seminar Series. 2016.

"Managing your forage mass." In Ohio Forage and Grassland Council. 2014.

"Pasture cover: Measurement of pasture mass and its use as a metric for forage/grazing systems." In Monthly Webinar American Forage and Grassland Council. 2010.

"Management Intensive Grazing." In Monthly Meeting OSU Horsemenâ€™s Club. 2010.

"The long and short of grazing: pre-graze and post-graze targets." In Annual Conference of Michigan Forage and Grassland Council. 2010.

"What do the rising plate meter and your forage inventory have in common?." In Annual Meeting of the Ohio Forage and Grassland Council. 2010.

"Mud, Dirt or Soil? Soil Science 101 - An Introduction to Soil and Its Effects on Native Plants." In Monthly Meeting of the "Wild Ones". 2010.

"Pasture Management." In Quarterly meeting of the Ohio Alpaca Breeders Assoc. 2010.

"Rotational grazing management â€“ when to hold & when to fold." In Annual Meeting of the Ohio Forage and Grassland Council. 2009.

"Nitrogen: Clover vs Fertilizer, responses and economics." In North Central Ohio Dairy Grazing Conference. 2009.

"Economics of endophyte control in beef systems." In University of Illinois, Dudley Smith Field Day. 2008.

"Update on OSU research." In North Central Ohio Dairy Grazing Conference. 2008.

"New options in forage management." In Annual Seed Seminar Central Farm and Garden, Inc.. 2008.

"Pasture Fertility â€“ Implications of Grazing." In Annual Meeting of the Ohio Forage and Grassland Council. 2007.

"Forage Grazing Research in Ohio - Update." In Ohio Forage and Grassland Council Annual Meeting. 2006.

"Species richness affects grassland yield and yield stability across seasons, sites and years." In XX International Grassland Congress. 2005.

"The endophyte problem & The non-toxic solution." In Ohio Forage and Grassland Council Annual Meeting. 2005.

"OSU Research Update." In Ohio Forage and Grassland Council Annual Meeting. 2004.

"Seeding Method Comparisons to Improve Kura Clover Establishment." In Grazinglands Conservation Initiative (GLCI) National Conference. 2003.

"Plenary presentation - Drought Adaption in Forage Species." In International Grassland Congress. 2001.

"A pasture competition model in which Hopf bifurcations are induced by a delay." In Australian and NZ Industrial Applied Mathematics Conference. 2000.

"Anthropogenic Impacts on Some Indigenous Species in North Island, New Zealand, Hill Country Pasture." In Nature Conservation in Production Environments: Managing the Matrix. 1997.

"Indicators of Farm Resource Status." In Proceedings of the Soil and Land Indicators Workshop. 1995.

"Recent and current results from Bromus spp., Maru, and Wana in hill country." In AgResearch Science and Technology Transfer Workshop. 1992.

Technical Reports

McCormick, J.; Sulc, R.M.; Barker, D., "2018 Ohio Forage Performance Trials" 2018.

McCormick, J.S.; Sulc, R.M.; Barker, D., "2017 Ohio Forage Performance Trials" 2017.

Barker, D.; Culman, S.; Dorrance, A.E.; Fulton, J. et al., "Ohio Agronomy Guide, 15th Edition" 2017.

J.S. McCormick, R.M. Sulc, D. J. Barker, "2016 Ohio Forage Performance Trials" 2016.

McCormick, J.S., Sulc, R.M., and Barker, D.J., "Ohio Forage Performance Trials 2014" 2014.

McCormick, J.S., Sulc, R.M., and Barker, D.J., "Ohio Forage Performance Trials 2013" 2013.

McCormick, J.S., Sulc, R.M., and Barker, D.J., "Ohio Forage Performance Trials 2012" 2012.

Barker, D.J., Sulc, R.M. and McCormick, J.S., "Field Guide for Lambsear Establishment" 2012.

Barker, D.J., Sulc, R.M., and McCormick, J.S., "Field Guide for Lambsear Management" 2012.

Sulc, R.M., McCormick, J.S., and Barker, D.J., "Ohio Forage Performance Trials 2011" 2011.

Sulc, R.M., McCormick, J.S., and Barker, D.J., "Ohio Forage Performance Trials 2010" 2010.

Sulc, R.M., McCormick, J.S., Barker, D.J. and K.A. Diedrick., "Ohio Forage Performance Trials 2009" 2009.

Sulc, R.M., McCormick, J.S., Barker, D.J. and Diedrick, K.A., "Ohio Forage Performance Trials 2008" 2008.

Sulc, R.M., McCormick, J.S., Barker, D.J. and Diedrick, K.A., "Ohio Forage Performance Trials 2007" 2007.

McCormick, J.S., Sulc, R.M., Rhodes, L.H., Barker, D.J. and Diedrick, K.A., "Ohio Forage Performance Trials 2006" 2006.

Barker, D.J., and Sulc, R.M., "Pasture and grazing management. Chapter 9 In Ohio Agronomy Guide, 14th ed. Bull. 472" 2005.

Sulc, R.M., and D.J. Barker, "Forage production. Chapter 7 in Ohio Agronomy Guide. 14th ed, Bulletin 472" 2005.

Sulc, R.M., McCormick, J.S., Rhodes, L.H., and Barker, D.J., "Ohio Forage Performance Trials 2005" 2005.

Sulc, R.M., McCormick, J.S., Rhodes, L.H., and Barker, D.J., "Ohio Forage Performance Trials 2004" 2004.

McCormick, J.S., Sulc, R.M., Rhodes, L.H., and Barker, D.J. Hammond, R.B., "Ohio Forage Performance Trials 2003" 2003.

McCormick, J.S., Sulc, R.M., Rhodes, L.H., and Barker, D.J. Hammond, R.B., "Ohio Forage Performance Trials 2002" 2002.

McCormick, J.S., Sulc, R.M., Rhodes, L.H., and Barker, D.J. Hammond, R.B., "Ohio Forage Performance Trials 2001" 2001.

Sulc, R.M., McCormick, J.S., Rhodes, L.H., Willson, H., Barker, D.J., Grimes, J., Hammond, R.B., "Ohio Forage Performance Trials 2000" 2000.

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Dr. David Barker

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Profile Tabs

Professional Information

POSITIONS HELD

AREAS OF RESPONSIBILITY IN EXTENSION, RESEARCH, TEACHING

COURSES TAUGHT

GRADUATE ADVISING

Works

Journal Articles

Chapters

Conferences

Presentations

Technical Reports