Research Publications

Recent publications (2010 - Present)

de Koff, J.P., and T. Broyles.听 2019.听 Extension agents' perceptions of climate change and听training needs.听 Natural Sciences Education 48:1-9.听 doi:10.4195/nse2019.01.0001.

Tetteh, E., J.P. de Koff, B. Pokharel, R. Link, and C. Robbins.听 2019.听 Effect of winter听canola cultivar on seed yield, oil, and protein content.听 Agron. J. 111:1-10. doi:10.2134/agronj2018.08.0494

Illukpitiya, P., and J.P. de Koff.听 2019.听 An economic assessment of nutrient removal听from switchgrass production.听 Research in Applied Economics 11(2):26-38.听doi: 10.5296/rae.v11i2.14998

Hui, D., C.-L. Yu, Q. Deng, P. Saini, K. Collins, and J. de Koff.听 2018.听 Weak effects of听biochar and nitrogen fertilization on switchgrass photosynthesis, biomass, and soil respiration.听 Agriculture 8:1-12.听

Li, J.听 S. Jian, J.P. de Koff, C.S. Lane, G. Wang, M.A. Mayes, and D. Hui.听 2018.听Differential effects of warming and nitrogen fertilization on soil respiration and microbial dynamics in switchgrass croplands.听 GCB Bioenergy 1-12. doi: 10.1111/gcbb.12515

de Koff, J.P.听 2017.听 Drones in Extension programming: Implementation of adult听and youth activities.听 Journal of Extension 55(6):6FEA6.听 Available at:

de Koff, J.P., J.C. Ricketts, C. Robbins, P. Illukpitiya, and A. Wade.听 2017.听 Meeting听stakeholder energy technology education needs using a mobile demonstration.听 Journal of Extension 55(6):6FEA8.听 Available at:听

Saini, P., J.P. de Koff, A. Allison, and C. Hamilton.听 2017.听 Changes in lignocellulosic听polymers, carbon and energy in switchgrass for bioenergy production.听 Agronomy Journal 109:1-9.听 doi:10.2134/agronj2017.02.0063

Aziz, A., F. Tegegne, J.P. de Koff, and R. Wiemers.听 2017.听 Biofuel training workshops听for diverse stakeholders ranging from pre-college students to educators.听 Natural Sciences Education 46. doi:10.4195/nse2016.11.0033

Akinya, A., P. Illukpitiya, and J.P. de Koff.听 2016.听 Economic analysis of small scale on-farm production of biodiesel and vegetable oil for industrial use from winter oilseed crops.听 Journal of Global Agriculture and Ecology 5(1):19-29.

de Koff, J.P., and A. Allison.听 2015.听 Changes in nutrient characteristics of switchgrass for bioenergy.听 Agronomy Journal 107:2401-2409.

de Koff, J.P., P.A. Moore, Jr., R.D. Williams, R. Young, and P.J.A. Kleinman.听 2013.听 Utilizing water treatment residuals to reduce phosphorus runoff from biosolids.听 J. Environ. Sci. and Eng. A 2:405-417.

de Koff, J.P., P.A. Moore, Jr., S.J. Formica, M. Van Eps, and P.B. DeLaune.听 2011.听 Effects of pasture renovation on hydrology, nutrient runoff, and forage yield.听 J. Environ. Qual.听 40:320-328.

de Koff, J.P., B.D. Lee, R.S. Dungan, and J.B. Santini.听 2010.听 Effect of compost-, sand-, or gypsum-amended waste foundry green sands on turfgrass yields and nutrient content.听 J. Environ. Qual.听 39:375-383.