Research Summary
Work on horticultural crops has included crop insurance, economic evaluation of plum pox virus, high tunnel production systems, alternative apple and peach production systems, irrigation, mechanical harvesters, hydroponic vegetable production, fruit quality.
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Recent Publications
Invasion of the Brown Marmorated Stink Bug (Hemiptera: Pentatomidae) into the United States: Developing a National Response to an Invasive Species Crisis through Collaborative Research and Outreach Efforts
Ludwick, D., Morrison, W. R., Acebes-Doria, A. L., Agnello, A. M., Bergh, J. C., Buffington, M. L., Hamilton, G. C., Harper, J. K., Hoelmer, K. A., Krawczyk, G., Kuhar, T. P., Pfeiffer, D. G., Nielsen, A. L., Rice, K. B., Rodriguez-Saona, C., Shearer, P. W., Shrewsbury, P. M., Talamas, E. J., Walgenbach, J. F., Wiman, N. G., & 1 others, 2021, In: Journal of Integrated Pest Management. 11, 1, 4.Research output: Contribution to journal › Article › peer-review
Milk price changes in Poland in the context of the common agricultural policy
Borawski, P., Guth, M., Truszkowski, W., Zuze, D., Beldycka-Borawska, A., Mickiewicz, B., Szymanska, E., Harper, J. K. & Dunn, J. W., 2020, In: Agricultural Economics (Czech Republic). 66, 1, p. 19-26 8 p.Research output: Contribution to journal › Article › peer-review
Changes in grassland and their impact on milk production in Poland in the context of environmental protection
Bórawski, P., Gotkiewicz, W., Bełdycka-Bórawska, A., Szymańska, E. J., Brelik, A., Harper, J. K. & Dunn, J. W., 2020, In: Polish Journal of Environmental Studies. 29, 2, p. 1567-1578 12 p.Research output: Contribution to journal › Article › peer-review
Factors shaping cow's milk production in the EU
Bórawski, P., Pawlewicz, A., Parzonko, A., Harper, J. K. & Holden, L., 2020, In: Sustainability (Switzerland). 12, 1, 5510.Research output: Contribution to journal › Article › peer-review
Programs to promote adoption of conservation tillage: A Serbian case study
Harper, J. K., Roth, G. W., Garalejić, B. & Škrbić, N., Nov 2018, In: Land Use Policy. 78, p. 295-302 8 p.Research output: Contribution to journal › Article › peer-review
Balancing multiple objectives in organic feed and forage cropping systems
Schipanski, M. E., Barbercheck, M. E., Murrell, E. G., Harper, J., Finney, D. M., Kaye, J. P., Mortensen, D. A. & Smith, R. G., Feb 15 2017, In: Agriculture, Ecosystems and Environment. 239, p. 219-227 9 p.Research output: Contribution to journal › Article › peer-review
Agricultural costs of the Chesapeake Bay total maximum daily load
Kaufman, Z., Abler, D., Shortle, J., Harper, J., Hamlett, J. & Feather, P., Dec 16 2014, In: Environmental Science and Technology. 48, 24, p. 14131-14138 8 p.Research output: Contribution to journal › Article › peer-review
Impact of Producer Risk Preferences on Selection of Fresh-Market Apple Training Systems
Harper, J. K., Jimenez-Maldonado, A. J., Crassweller, R. M. & Smith, D. E., Jul 2013, In: International Journal of Fruit Science. 13, 3, p. 265-273 9 p.Research output: Contribution to journal › Article › peer-review
Integrating mechanical and reduced chemical weed control in conservation tillage corn
Bates, R. T., Gallagher, R. S., Curran, W. S. & Harper, J. K., Mar 2012, In: Agronomy Journal. 104, 2, p. 507-517 11 p.Research output: Contribution to journal › Article › peer-review
Integrating insecticides and Trichogramma ostriniae to control European corn borer in sweet corn: Economic analysis
Gardner, J., Hoffmann, M. P., Pitcher, S. A. & Harper, J. K., Jan 2011, In: Biological Control. 56, 1, p. 9-16 8 p.Research output: Contribution to journal › Article › peer-review
Reduced-risk pest management programs for eastern U.S. apple and peach orchards: A 4-year regional project
Agnello, A. M., Atanassov, A., Bergh, J. C., Biddinger, D. J., Gut, L. J., Haas, M. J., Harper, J. K., Hogmire, H. W., Hull, L. A., Kime, L. F., Krawczyk, G., McGhee, P. S., Nyrop, J. P., Reissig, W. H., Shearer, P. W., Straub, R. W., Villanueva, R. T. & Walgenbach, J. F., 2009, In: American Entomologist. 55, 3, p. 184-197 14 p.Research output: Contribution to journal › Article › peer-review
An excel-based decision aid for evaluating financing alternatives and the Marginal cost of capital
Stokes, J. R. & Harper, J. K., Nov 1 2008, In: Agricultural Finance Review. 68, 2, p. 339-348 10 p.Research output: Contribution to journal › Review article › peer-review
Velvetleaf (abutilon theophrasti) interference and seed production in corn silage and grain
Werner, E. L., Curran, W. S., Harper, J. K., Roth, G. W. & Knievel, D. P., Jul 2004, In: Weed Technology. 18, 3, p. 779-783 5 p.Research output: Contribution to journal › Article › peer-review
Impact of apple rootstock/cultivar on processing market profitability
Harper, J. K., Crassweller, R. M. & Smith, D. E., Apr 2002, In: Journal of the American Pomological Society. 56, 2, p. 112-117 6 p.Research output: Contribution to journal › Article › peer-review
Potential of shorter corn/alfalfa rotations for dairy farms
Roth, G. W., Harper, J. K., Hower, A. A. & Kyper, R. A., 2002, In: Journal of Sustainable Agriculture. 20, 2, p. 41-52 12 p.Research output: Contribution to journal › Article › peer-review