Previous Megapit Soil Archive Requests

Wondering how others are using NEON soil samples? Here is a list of previous requests. We encourage you to collaborate with these researchers if you have similar interests! 

Focus area: Humic and fulvic acids
Sites requested: All
Horizons requested: All
Years samples provided: 2013-2016
Requestor: Geoff Davies, Northeastern University
Project products:

• Ghabbour et al. 2015 Measuring the total and sequestered organic matter contents of grassland and forest soil profiles in the National Ecological Observatory Network Initiative. Soil Horizons 56, doi: 10.2136/sh15-07-0014
• Davies & Ghabbour 2015 Measuring Sequestered Carbon Contents of Grassland and Forest Soil Profiles in the Neon Initiative, National Cooperative Soil Survey National Conference, Duluth, MN 

Focus area: Bulk 14C content
Sites requested: All
Horizons requested: All
Years samples provided: 2015-2018
Requestor: Carlos Sierra, Max Planck Institute for Biogeochemistry
Project Products:

• Beem-Miller, J., & Sierra, C. A. (2023). NEON Soil Radiocarbon Data [Data set]. Zenodo. https://doi.org/10.5281/zenodo.10126878 

Focus area: Bulk 15N, 13C, oxalate and dithionite extractable Fe, Al, Si and oxalate and dithionite extractable Fe, Al, Si  on the silt and clay fraction
Sites requested: All
Horizons requested: All
Years samples provided: 2014-2018
Requestor: Marc Kramer, University of Florida
Project products: 

• Kramer & Chadwick 2018 Climate-driven thresholds in reactive mineral retention of soil carbon at the global scale. Nature Clim Change 8, 1104–1108. https://doi.org/10.1038/s41558-018-0341-4 

Focus area: Oxygen isotope systematics during nitrification
Sites requested: HARV, OSBS, ORNL, TALL, CPER, JORN
Horizons requested: A (shallowest subhorizon)
Years samples provided: 2015
Requestor: Greg Michalski, Purdue University

Focus area: FTIR, mineral-associated OM, metal extractions
Sites requested: HARV, BLAN, SCBI, OSBS, JERC, DSNY, DELA, UNDE, KONZ, UKFS, DCFS, WOOD, NOGP, CPER, STER, RMNP, OAES, NIWO, JORN, ONAQ
Horizons requested: All mineral
Years samples provided: 2016-2018
Requestor: Jonathan Sanderman, Woods Hole Research Center
Project products

• Dangal & Sanderman 2020 Is Standardization Necessary for Sharing of a Large Mid-Infrared Soil Spectral Library? Sensors 20, 6729. https://doi.org/10.3390/s20236729
• Dangal & Sanderman 2019 Application of Piecewise Direct Standardization for Precise and Accurate Prediction of Soil Properties and Carbon Fractions Using Spectra from Multiple Spectrometers, ASA-CSSA-SSSA International Annual Meeting, San Antonio, TX; https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/121702 

Focus area: Composition of soil C based on new solid state spectroscopic methods
Sites requested: All
Horizons requested: O and A (all subhorizons)
Years samples provided: 2017
Requestor: Margaret Bowman, University of Colorado

Focus area: Biogeography of Streptomyces
Sites requested: All
Horizons requested: A (shallowest subhorizon)
Years samples provided: 2018
Requestor: Steven Higgins, Cornell University

Focus area: The role of soil and iron-organic matter complexes as controls on redox chemistry driving NO2(g)-to-HONO conversion across a gradient of soil
Sites requested: HARV, SCBI, OSBS, GUAN, UNDE, KONZ, TALL, WOOD, CLBJ, NIWO, SRER, ONAQ
Horizons requested: A (shallowest subhorizon)
Years samples provided: 2018
Requestor: Rebecca Abney, Indiana University, Bloomington
Project products: 

• Abney et al. 2018 Soil organic matter and mineralogy as controls on NO2 deposition and HONO emissions from soil surfaces, AGU Fall Meeting, Washington, D.C. https://agu.confex.com/agu/fm18/meetingapp.cgi/Paper/369558

Focus area: Carbon content of different soil fractions
Sites requested: All
Horizons requested: All
Years samples provided: 2019
Requestor: Jocelyn Lavallee, Colorado State University
Project products: 

• Hansen, P., Even, R., King, A., Lavallee, J., Schipanski, M., & Cotrufo, M. F. (2024). Distinct, direct and climate-mediated environmental controls on global particulate and mineral-associated organic carbon storage. Global Change Biology, 30, e17080.
• Hansen, P., Even, R., King, A., Lavallee, J., Schipanski, M., & Cotrufo, M. F. (2023). Particulate and mineral-associated organic carbon storage [Data set]. Zenodo. https://doi.org/10.5281/zenodo.10182813
• Data for all Megapit horizons are available through the SCSC Consortium
• Zhang et al. 2021 Simulating measurable ecosystem carbon and nitrogen dynamics with the mechanistically defined MEMS 2.0 model, Biogeosciences, 18, 3147–3171. https://doi.org/10.5194/bg-18-3147-2021

Focus area: 13C nuclear magnetic resonance (CPMAS NMR) spectroscopic analyses to assess controls on soil organic matter chemical composition
Sites requested: HARV, SCBI, DSNY, OSBS, GUAN, UNDE, KONZ, GRSM, LENO, WOOD, CPER, NIWO, SRER, ONAQ, BART, JERC, DCFS, CLBJ, MOAB, JORN, RMNP, LAJA, UKFS, MLBS, ORNL, TALL, ABBY, WREF, SJER, SOAP, TEAK, TOOL, BONA, HEAL
Horizons requested: A (shallowest subhorizon)
Years samples provided: 2018
Requestor: Steven Hall, Iowa State University
Project Products:

• Hall et al. 2020 Molecular trade-offs in soil organic carbon composition at continental scale. Nat. Geosci. 13, 687–692. https://doi.org/10.1038/s41561-020-0634-x
• Hall et al. 2019 Soil Organic Matter Molecular Composition Reveals Tradeoffs in Mechanisms of C Persistence Among Ecosystems in the NEON Network, AGU Fall Meeting, San Francisco, CA. https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/513289 

Focus area: Quantitative guidelines for establishing and operating soil archives
Sites requested: NA (no samples required)
Horizons requested: NA (no samples required)
Years samples provided: NA
Requestor: Edward Ayres, NEON
Project products:

• Ayres 2019 Quantitative Guidelines for Establishing and Operating Soil Archives. Soil Science Society of America Journal 83, 973-981. https://doi.org/10.2136/sssaj2019.02.0050 

Focus area: Effects of climate, soil properties and vegetation on chemical forms of manganese, phosphorus, sulfur and dissolved organic matter in soils; and Interrogating the Composition and Formation of Mineral-stabilized Organic Matter in Soils across an Ecoclimatic Gradient
Sites requested: All
Horizons requested: All
Years samples provided: 2020
Requestor: Mengqiang Zhu, University of Wyoming

Focus area: The provenance and chemical characteristics of dust deposition from the Colorado Plateau to the Central Plains
Sites requested: CPER, NIWO, MOAB
Horizons requested: All
Years samples provided: 2022
Requestor: Jessica Callen, Colorado State University

Focus area: Generating lab-derived soil moisture release curves from the NEON-SRER Megapit archive to translate soil water content into soil water potential
Sites requested: SRER
Horizons requested: All
Years samples provided: 2023
Requestor: Jessica Guo, University of Arizona

Focus area: Petrogenic (rock-derived) organic carbon content​​​​​​​
Sites requested: ABBY, BART, BLAN, CPER, DCFS, DELA, GRSM, JORN, KONA, KONZ, LENO, MLBS, MOAB, NIWO, NOGP, OAES, ONAQ, SERC, SOAP, SRER, STEI, STER, TALL, TREE, WOOD, WREF​​​​​​​
Horizons requested: A, B, C, E
Years samples provided: 2023
Requestor: Katerina Georgiou, Lawrence Livermore National Laboratory

Focus area: Compare soil organic and inorganic carbon amounts and characterize SOM bulk molecular quality and SIC isotopic compositions in dryland ecosystems
Sites requested: CLBJ, CPER, GUAN, JORN, MOAB, NIWO, ONAQ, RMNP, SJER
Horizons requested: A, E, B, C
Years samples provided: 2024
Requestor: Meredith Johnson, Baylor University

Focus area: The significance of soil organic matter, specifically the molecular composition of soil OC, in influencing the environmental behavior of PFAS
Sites requested: ABBY, DCFS, GUAN, HARV, HEAL, KONZ, LENO, NIWO, RMNP, SCBI, SOAP, UKFS, UNDE, WREF, CLBJ, LAJA, MLBS, ORNL, JORN
Horizons requested: A (selected subhorizons)
Years samples provided: 2024
Requestor: Manyiel Mel, Baylor University