Soil Science Research

Soil Survey Research Program

Relevance

Legislative Mandate PL 89-560:

The Soil Survey Program “promotes the soil survey and provides technical assistance in its use for a wide range of community planning and resource development issues related to non-farm and farm uses.”

Soil Research

1. collects high quality soil data to support soil survey and deepen knowledge and understanding of soil landscapes;
2. generates and improves soil interpretations by providing in-depth research;
3. provides training and supporting documents for the successful conductance of field soil surveys; and
4. develops new standards and methodologies for soil investigations.

Major Goals

Conducts research on soil genesis, functions, and behavior under natural and anthropogenic influences. Provides soil characterization data and develops standards and training in support of the National Cooperative Soil Survey at national and international levels. Provides data and technical information support for conservation programs.

Research Branch Staff

Skye Wills, Ph.D. – National Leader for Soil Science Research
Research interests: Soil carbon, sampling statistics, inference space of research results     
Email: skye.wills@usda.gov                   
Link to bio

Tiffany Carter, Ph.D. – Assistant National Leader for Soil Science Research
Research interests: Biologic soil health indicators, microbiology, techniques for carbon quantification
Email: tiffany.carter@usda.gov
Link to bio

Ekundayo Adeleke, Ph.D. – Natural Resource Specialist
Research interests: Dynamic soil properties, soil biochemistry and biodiversity, soil management, agricultural soils, method development
Email: ekundayo.adeleke@usda.gov
Link to bio

Katy Dynarski, Ph.D. – Research Soil Scientist
Research interests: soil carbon dynamics, soil health, biogeochemistry, working lands
Email: katherine.dynarski@usda.gov
Link to bio

Ryan Hodges, Ph.D. – Research Soil Scientist
Research interests: Pedology, taxonomy, soil mineralogy, volcanic ash-influenced, and tropical/acid soil systems
Email: ryan.hodges@usda.gov
Link to bio

Jonathan Maynard, Ph.D. – Research Soil Scientist
Research interests: Soil spectroscopy, biogeochemistry, soil inference systems
Email: jonathan.maynard@usda.gov
Link to bio

Travis Nauman, Ph.D. – Research Soil Scientist
Research interests: Digital soil mapping, ecological management frameworks, pedology, erosional processes
Email: travis.nauman@usda.gov
Link to bio

Amanda Pennino, Ph.D. – Research Soil Scientist
Research interests: Hydropedology, soil moisture, forest soils, physical and hydraulic soil properties
Email: amanda.pennino@usda.gov
Link to bio

Erin Rooney, Ph.D. – Research Soil Scientist
Research interests: Permafrost, soil disturbance, microprocesses, iron-carbon interactions and redox
Email: erin.rooney@usda.gov
Link to bio

Regional Research Liaisons

Research liaisons serve as a point of contact for their assigned region. They can provide general information about soil survey research and put regional staff in touch with experts for specific questions or studies. Each scientist can provide technical and academic advice and information in their area of expertise.

Alaska – Erin Rooney
Northwest – Jon Maynard
Southwest – Travis Nauman
North Central – Ekundayo Adeleke
South Central – Tiffany Carter
Northeast – Amanda Pennino
Southeast – Ryan Hodges

Recent Publications From the Research Branch

Nauman, T.W., Kienast-Brown, S., Roecker, S.M., Brungard, C., White, D., Philippe, J., and Thompson, J.A., 2024. Soil landscapes of the United States (SOLUS): developing predictive soil property maps of the conterminous United States using hybrid training sets. Soil Science Society of America Journal, 1–19. https://doi.org/10.1002/saj2.20769. In press.

Pennino, A., Strahm, B.D., McGuire, K.J., Bower, J.A., Bailey, S.W., Schreiber, M.E., Ross, D.S., Duston, S.A., and Benton, J.R., 2024. Forest catchment structure mediates shallow subsurface flow and soil base cation fluxes. Geoderma, 450, p.117045.

Tyree, G.L., Chappell, A., Villarreal, M.L., Dhital, S., Duniway, M.C., Edwards, B.L., Faist, A.M., Nauman, T.W., and Webb, N.P., 2024. Oil and gas development influences potential for dust emission from the Upper Colorado River Basin, USA. Earth Surface Processes and Landforms n/a. https://doi.org/10.1002/esp.5887

Dhital, S., Webb, N.P., Chappell, A., Kaplan, M.L., Nauman, T.W., Tyree, G., Duniway, M.C., Edwards, B., LeGrand, S.L., Letcher, T.W., McKenzie Skiles, S., Naple, P., Chaney, N.W., and Cai, J., 2024. Synoptic Analysis and WRF-Chem Model Simulation of Dust Events in the Southwestern United States. Journal of Geophysical Research: Atmospheres 129, e2023JD040650. https://doi.org/10.1029/2023JD040650

Hodges, R.C., Boettinger, J.L., and Deenik, J.L., 2024. Elemental trends and weathering indices to assess volcanic ash deposition on soil weathering status along Maui climosequences. Geoderma Regional, e00872. https://doi.org/10.1016/j.geodrs.2024.e00872

Adeleke, E., Wills, S., and Carter, T., 2024. Dynamic Soil Properties for Soil Health (DSP4SH) Database 1.0 – Phase 1 and 2 datasets. Data in Brief, 110521. https://doi.org/10.1016/j.dib.2024.110521

Adeleke, E., Wills, S., and Carter, T., 2024. Dynamic Soil Properties for Soil Health Database v. 1.0. AgData Commons. https://doi.org/10.15482/usda.adc/25122323.v1

Bower, J.A., Ross, D.S., Bailey, S.W., Pennino, A.M., Jercinovic, M.J., McGuire, K.J., Strahm, B.D., and Schreiber, M.E., 2023. Development of a lateral topographic weathering gradient in temperate forested podzols. Geoderma, 439, p.116677. https://doi.org/10.1016/j.geoderma.2023.116677

Maynard, J.J., Yeboah, E., Owusu, S., Buenemann, M., Neff, J.C., and Herrick, J.E., 2022. Accuracy of regional-to-global soil maps for on-farm decision making: Are soil maps “good enough”?. EGUsphere, 2022, pp.1-35. https://doi.org/10.5194/soil-9-277-2023, 2023. 

Nauman, T.W., Munson, S.M., Dhital, S., Webb, N.P., and Duniway, M.C., 2023. Synergistic soil, land use, and climate influences on wind erosion on the Colorado Plateau: Implications for management. Science of the Total Environment, 893, p.164605. https://doi.org/10.1016/j.scitotenv.2023.164605

McNellis, B.E., Knight, A.C., Nauman, T.W., Chambers, S.N., Brungard, C.W., Fick, S.E., Livensperger, C.G., Borthwick, S., and Duniway, M.C., 2023. Livestock removal increases plant cover across a heterogeneous dryland landscape on the Colorado Plateau. Environmental Research Letters, 18(3), p.034034. https://doi.org/10.1088/1748-9326/acb728

Lin, J.S., Sarto, M.V., Carter, T.L., Peterson, D.E., Gura, C., Mino, L., Rohrs, M., Lucas, H., Clark, J., and Rice, C.W., 2023. Soil organic carbon, aggregation and fungi community after 44 years of no-till and cropping systems in the Central Great Plains, USA. Archives of Microbiology, 205(3), p.84. https://doi.org/10.1088/1748-9326/acb728

Buenemann, M., Coetzee, M.E., Kutuahupira, J., Maynard, J.J., and Herrick, J.E., 2023. Errors in soil maps: The need for better on-site estimates and soil map predictions. Plos one, 18(1), p.e0270176. https://doi.org/10.1371/journal.pone.0270176