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.