Final eddy covariance dataset to support lessons from long-term monitoring of carbon gains and losses in cropping systems

Annual net ecosystem exchange (NEE), yield, and net ecosystem carbon
budget (NECB) for different cropping systems in the Midwest US. Values are
taken from previously published values that are available from Ameriflux.
The datasets specifically used were US-UiA University of Illinois
Switchgrass, US-UiB University of Illinois Miscanthus, US-UiC University
of Illinois Maize-Soy, US-UiD University of Illinois Restored Native
Prairie and US-Bo Bondville. Each dataset was quality assured and gap
filled following the same method as outlined in Moore et al., (2020) for
all sites. NECB was calculated using annual yield data based on dry mass
for each crop and carbon content fraction of 0.48 for biomass harvests
(Miscanthus, switchgrass and restored prairie) and 0.45 for grain harvests
(maize-soybean systems). CT refers to conventional tillage and NT refers
to no-till maize/soy systems. Values below zero represent an annual net
uptake of carbon, while values above zero represent an annual net carbon
loss from the system. Missing values are denoted as NaN. 

# Dryad dataset Dataset DOI:
[10.5061/dryad.kd51c5bjt](10.5061/dryad.kd51c5bjt) ## Description of the
data and file structure This dataset was produced by combining outputs
from five flux tower sites operating in the Midwest USA. The flux data are
available on the open Ameriflux data repository
at [https://ameriflux.lbl.gov/](https://ameriflux.lbl.gov/) and the site
codes are US-UiA University of Illinois Switchgrass, US-UiB University of
Illinois Miscanthus, US-UiC University of Illinois Maize-Soy, US-UiD
University of Illinois Restored Native Prairie and US-Bo Bondville. Each
dataset was quality assured and gap filled following the same method as
outlined in Moore et al., (2020) for all sites
([https://doi.org/10.1111/gcbb.12743)](https://doi.org/10.1111/gcbb.12743). NECB was calculated using annual yield data based on dry mass for each crop and carbon content fraction of 0.48 for biomass harvests (Miscanthus, switchgrass and restored prairie) and 0.45 for grain harvests (maize-soybean systems). CT refers to conventional tillage and NT refers to no-till maize/soy systems. Missing values are denoted as NaN.  ### Files and variables #### File: UIUC_Final_Data.csv **Description:** Net ecosystem exchange (NEE), yield, and net ecosystem carbon balance (NECB) data for agroecosystems in the midwest USA.  ##### The column names in the file "UIUC_Final_Data.csv" are as follows: * Maize_CT_NEE: net ecosystem exchange from conventionally tilled maize (g C m ^-2^ year) * Maize_NT_NEE: net ecosystem exchange from no-tilled maize (g C m ^-2^ year) * Miscanthus_NEE: net ecosystem echange from miscanthus (g C m ^-2^ year) * RestoredPrairie_NEE: net ecosystem echange from restored prairie (g C m ^-2^ year) * Switchgrass_NEE: net ecosystem echange from switchgrass (g C m ^-2^ year) * Maize_CT_Yield: harvested yield from conventionally tilled maize (g C m ^-2^) * Maize_NT_Yield: harvested yield from no-tilled maize (g C m ^-2^) * Miscanthus_Yield: harvested yield from miscanthus (g C m ^-2^) * RestoredPrairie_Yield: harvested yield from restored prairie (g C m ^-2^) * Switchgrass_Yield: harvested yield from switchgrass (g C m ^-2^) * Maize_CT_NECB: net ecosystem carbon balance from conventionally tilled maize (g C m ^-2^ year) * Maize_NT_NECB: net ecosystem carbon balance from no-tilled maize (g C m ^-2^ year) * Miscanthus_NECB: net ecosystem carbon balance from miscanthus (g C m ^-2^ year) * RestoredPrairie_NECB: net ecosystem carbon balance from restored prairie (g C m ^-2^ year) * Switchgrass_NECB: net ecosystem carbon balance from switchgrass (g C m ^-2^ year) ## Code/software The file is a CSV and can be viewed with various programs (e.g. R, Python, Excel) ## Access information Other publicly accessible locations of the data: * Ameriflux Data Repository:  [https://ameriflux.lbl.gov/](https://ameriflux.lbl.gov/) Data was derived from the following sources: * Moore CE, Berardi DM, Blanc-Betes E, et al. The carbon and nitrogen cycle impacts of reverting perennial bioenergy switchgrass to an annual maize crop rotation. *GCB Bioenergy*. 2020; 12: 941–954. [https://doi.org/10.1111/gcbb.12743](https://doi.org/10.1111/gcbb.12743) * Blakely, B., Moore, C.E., Pederson, T.L., Gibson, C.D., Benson, M.C., Dracup, E. and Bernacchi, C.J. (2025), Climate Forcing of Bioenergy Feedstocks: Insights From Carbon and Energy Flux Measurements. GCB Bioenergy, 17: e70026. [https://doi.org/10.1111/gcbb.70026](https://doi.org/10.1111/gcbb.70026)