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                    U.S. DEPARTMENT OF AGRICULTURE
 National Laboratory for Agriculture and The Environment: Ames, IA
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ARS Home Midwest Area Ames, Iowa National Laboratory for Agriculture and The Environment People







Bryan  Emmett    Research Microbiologist /ARSUserFiles/55825/BryanEmmett2.jpg
 I am a Research Microbiologist in the Soil, Water and Air unit at NLAE.  My lab seeks to understand environmental and microbial controls on emissions of nitrous oxide from soil, a potent greenhouse gas.  Additionally, we work to investigate how management systems influence soil and plant-associated microbial communities, and the consequences for nutrient cycling and soil health. Ultimately, we aim identify tools that can help harness these communities to support plant productivity and limit nutrient losses from our agroecosystems.  I’m originally from Michigan, but have called Ohio, western Massachusetts, and upstate New York home. In January 2020, my family and I moved to Ames, Iowa to begin work at NLAE.  When not in the lab, I enjoy just about anything outdoors and try to find time for camping, fly-fishing, gardening and cooking.
 Publications(Clicking on the reprint iconReprint Icon  will take you to the publication reprint.)Winter camelina as an alternative cover crop for central Iowa corn-soybean systems-(Abstract Only) Kovar, J.L., O'Brien, P.L., Ruis, S.J., Emmett, B.D., Malone, R.W., Rogovska, N.P. 2023. Winter camelina as an alternative cover crop for central Iowa corn-soybean systems [abstract]. ASA-CSSA-SSSA Annual Meeting.Nutrient leaching from an artificially drained Midwestern Mollisol across various conservation practices-(Abstract Only) Rogovska, N.P., Kovar, J.L., Malone, R.W., O'Brien, P.L., Emmett, B.D., Ruis, S.J. 2023. Nutrient leaching from an artificially drained Midwestern Mollisol across various conservation practices [abstract]. ASA-CSSA-SSSA Annual Meeting.Nitrous oxide emissions from multiple agroecosystems in the U.S. Corn Belt simulated using the modified SWAT-C model-(Peer Reviewed Journal) Liang, K., Zhang, X., Qi, J., Emmett, B.D., Johnson, J.M., Malone, R.W., Moglen, G.E., Venterea, R.T. 2023. Nitrous oxide emissions from multiple agroecosystems in the U.S. Corn Belt simulated using the modified SWAT-C model . Environmental Pollution. 337 (2023). https://doi.org/10.1016/j.envpol.2023.122537.Long-term conservation practices reduce nitrate leaching while maintaining yields in tile-drained Midwestern soils-(Peer Reviewed Journal) Rogovska, N.P., O'Brien, P.L., Malone, R.W., Emmett, B.D., Kovar, J.L., Jaynes, D., Kaspar, T., Moorman, T.B., Kyveryga, P. 2023. Long-term conservation practices reduce nitrate leaching while maintaining yields in tile-drained Midwestern soils. Agricultural Water Management. 288. Article e108481. https://doi.org/10.1016/j.agwat.2023.108481.Harvested winter rye energy cover crop: multiple benefits for North Central US-(Peer Reviewed Journal) Malone, R.W., Radke, A.G., Herbstritt, S., Wu, H., Qi, Z., Emmett, B.D., Helmers, M., Schulte, L., Feyereisen, G.W., O'Brien, P.L., Kovar, J.L., Rogovska, N.P., Kladivko, E.J., Thorp, K.R., Kaspar, T., Jaynes, D.B., Karlen, D., Richard, T. 2023. Harvested winter rye energy cover crop: multiple benefits for North Central US. Environmental Research Letters. 18(7). https://doi.org/10.1088/1748-9326/acd708.Thirteen-year stover harvest and tillage effects on soil compaction in Iowa-(Peer Reviewed Journal) Phillips, C.L., Tekeste, M., Ebrahimi, E., Logsdon, S.D., Malone, R.W., O'Brien, P.L., Emmett, B.D., Karlen, D.L. 2023. Thirteen-year stover harvest and tillage effects on soil compaction in Iowa. Agrosystems, Geosciences & Environment. 6(2). Article e20361. https://doi.org/10.1002/agg2.20361.Long-term conservation management practices improve water quality and maintain crop yields in the Upper Midwest-(Abstract Only) Rogovska, N.P., O'Brien, P.L., Malone, R.W., Emmett, B.D., Jaynes, D., Moorman, T.B., Kaspar, T., Parkin, T. 2022. Long-term conservation management practices improve water quality and maintain crop yields in the Upper Midwest. [abstract]. ASA-CSSA-SSSA Annual Meeting.Rye as an energy cover crop: Management, forage quality, and revenue opportunities for feed and bioenergy-(Peer Reviewed Journal) Herbstritt, S., Richard, T.L., Lence, S.H., Wu, H., O'Brien, P.L., Emmett, B.D., Kaspar, T.C., Karlen, D.L., Kohler, K., Malone, R.W. 2022. Rye as an energy cover crop: Management, forage quality, and revenue opportunities for feed and bioenergy. Agriculture. 12(10). Article 12101691. https://doi.org/10.3390/agriculture12101691.Nitrate losses in subsurface drainage and nitrous oxide emissions from a winter camelina relay cropping system reveal challenges to sustainable intensification-(Peer Reviewed Journal) Emmett, B.D., O'Brien, P.L., Malone, R.W., Rogovska, N.P., Kovar, J.L., Kohler, K., Kaspar, T.C., Moorman, T.B., Jaynes, D.B., Parkin, T.B. 2022. Nitrate losses in subsurface drainage and nitrous oxide emissions from a winter camelina relay cropping system reveal challenges to sustainable intensification. Agriculture, Ecosystems and Environment. 339. Article 108136. https://doi.org/10.1016/j.agee.2022.108136.Use of improved nutrient practices in maize-based agroecosystems alter allocation between leaching and denitrification loss pathways-(Abstract Only) Abendroth, L.J., Eagle, A., Mcclellan Maaz, T., Helmers, M., Brouder, S., Christianson, L., Drury, C., Emmett, B.D., Fernandez, F., Gentry, L. 2022. Use of improved nutrient practices in maize-based agroecosystems alter allocation between leaching and denitrification loss pathways [abstract]. American Geophysical Union Fall Meeting, December 12-16, 2022, Chicago, Illinois.Nitrate losses and nitrous oxide emissions under contrasting tillage and cover crop management-(Peer Reviewed Journal) O'Brien, P.L., Emmett, B.D., Malone, R.W., Nunes, M.R., Kovar, J.L., Kaspar, T.C., Moorman, T.B., Jaynes, D.B., Parkin, T.B. 2022. Nitrate losses and nitrous oxide emissions under contrasting tillage and cover crop management. Journal of Environmental Quality. 51:683-695. https://doi.org/10.1002/jeq2.20361.Rye-soybean double-crop: planting method and N fertilization effects in the North Central US-(Peer Reviewed Journal) Malone, R.W., O'Brien, P.L., Herbstritt, S., Emmett, B.D., Karlen, D.L., Kaspar, T.C., Kohler, K., Radke, A.G., Lence, S.H., Wu, H., Richard, T.L. 2022. Rye-soybean double-crop: planting method and N fertilization effects in the North Central US. Renewable Agriculture and Food Systems. 37(5):445-456. https://doi.org/10.1017/S1742170522000096.Crop production response to conservation practices and sustainable intensification in a corn-soybean cropping system-(Abstract Only) O'Brien, P.L., Emmett, B.D., Kovar, J.L., Malone, R.W., Cambardella, C.A., Jaynes, D.B., Kaspar, T.C., Kohler, K.A., Moorman, T.B., Parkin, T.B. 2021. Crop production response to conservation practices and sustainable intensification in a corn-soybean cropping system [abstract]. ASA-CSSA-SSSA Annual Meeting. Paper no. 138076.Bridging the gap between microbial ecology and modeling to improve N2O models-(Abstract Only) Emmett, B.D., Del Grosso, S.J., Maul, J.E., Venterea, R.T., Cavigelli, M.A. 2021. Bridging the gap between microbial ecology and modeling to improve N2O models [abstract]. ASA-CSSA-SSSA. Paper No. 135591.N2O is an important piece of the puzzle, but seeing the whole picture strengthens denitrification research-(Research Notes) Emmett, B.D. 2021. N2O is an important piece of the puzzle, but seeing the whole picture strengthens denitrification research. Journal of Geophysical Research-Biogeosciences. 126(10). Article e2021JG006576. https://doi.org/10.1029/2021JG006576.Nitrogen losses in response to conservation practices and sustainable intensification of corn-soybean cropping systems in the Upper Midwest-(Abstract Only) Emmett, B.D., O'Brien, P.L., Malone, R.W., Kovar, J.L., Cambardella, C.A., Jaynes, D.B., Kaspar, T.C., Kohler, K.A., Moorman, T.B., Parkin, T.B. 2021. Nitrogen losses in response to conservation practices and sustainable intensification of corn-soybean cropping systems in the Upper Midwest [abstract]. Soil and Water Conservation Society Proceedings.Soil management legacy alters weed-crop competition through biotic and abiotic pathways-(Peer Reviewed Journal) Gan, H., Emmett, B.D., Drinkwater, L.E. 2021. Soil management legacy alters weed-crop competition through biotic and abiotic pathways. Plant and Soil. 462:543-560. https://doi.org/10.1007/s11104-021-04891-3.Conserved and reproducible bacterial communities associate with extraradical hyphae of arbuscular mycorrhizal fungi-(Peer Reviewed Journal) Emmett, B.D., Levesque-Tremblay, V., Harrison, M.J. 2021. Conserved and reproducible bacterial communities associate with extraradical hyphae of arbuscular mycorrhizal fungi. The ISME Journal: Multidisciplinary Journal of Microbial Ecology. 15:2276-2288. https://doi.org/10.1038/s41396-021-00920-2.  ProjectsImproved Management of Nutrients, Water, Agrochemicals, and Energy to Enhance Agriculture System SustainabilityIn-House Appropriated (D)Accession Number:441098Assessing the Effects of Conservation Practices on Crop Yield, Water Quality, and Greenhouse Gas Emissions in the U.S. Corn BeltNon-Funded Cooperative Agreement (N)Accession Number:444517  ARS News ArticlesNo news articles listed for this employee.


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