2025
Crespo, C., Kovar, J.L., Hart, C.E., Roth, R.T., O’Brien, P.L. and Ruis, S.J., 2025. Long-term field study on corn response to sulfur fertilization in Iowa, USA. Field Crops Research, 330, p.109990. https://doi.org/10.1016/j.fcr.2025.109990
2024
Johnson II, F.E., Roth, R.T., Ruffatti, M.D. and Armstrong, S.D., 2024. Cover crop impacts on nitrogen losses and environmental damage cost. Agriculture, Ecosystems & Environment, 363, p.108859. https://doi.org/10.1016/j.agee.2023.108859
2023
Ma, M., Reeling, C., Hughes, M.N., Armstrong, S. and Roth, R., 2023. Comparison of conservation instruments under long-run yield uncertainty and farmer risk aversion. European Review of Agricultural Economics, 50(5), pp.1685-1714. https://doi.org/10.1093/erae/jbad029
Roth, R.T., Lacey, C.G., Camberato, J.J. and Armstrong, S.D., 2023. Quantifying the fate of nitrogen from cereal rye root and shoot biomass using 15N. Nutrient Cycling in Agroecosystems, 125(2), pp.219-234. https://doi.org/10.1007/s10705-022-10213-5
Roth, R.T., Chen, K., Scott, J.R., Jung, J., Yang, Y., Camberato, J.J. and Armstrong, S.D., 2023. Prediction of Cereal Rye Cover Crop Biomass and Nutrient Accumulation Using Multi-Temporal Unmanned Aerial Vehicle Based Visible-Spectrum Vegetation Indices. Remote Sensing, 15(3), p.580. https://doi.org/10.3390/rs15030580
2022
Preza‐Fontes, G., Miller, H., Camberato, J., Roth, R. and Armstrong, S., 2022. Corn yield response to starter nitrogen rates following a cereal rye cover crop. Crop, Forage & Turfgrass Management, 8(2), p.e20187. https://doi.org/10.1016/j.agee.2023.108859
2020
Thompson, N.M., Armstrong, S.D., Roth, R.T., Ruffatti, M.D. and Reeling, C.J., 2020. Short‐run net returns to a cereal rye cover crop mix in a midwest corn–soybean rotation. Agronomy Journal, 112(2), pp.1068-1083. https://doi.org/10.1002/agj2.20132
2019
Ruffatti, M.D., Roth, R.T., Lacey, C.G. and Armstrong, S.D., 2019. Impacts of nitrogen application timing and cover crop inclusion on subsurface drainage water quality. Agricultural Water Management, 211, pp.81-88. https://doi.org/10.1016/j.agwat.2018.09.016
2018
Roth, R.T., Ruffatti, M.D., O'Rourke, P.D. and Armstrong, S.D., 2018. A cost analysis approach to valuing cover crop environmental and nitrogen cycling benefits: A central Illinois on farm case study. Agricultural systems, 159, pp.69-77. https://doi.org/10.1016/j.agsy.2017.10.007