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# Carbon Isotope Data from 1998-1999 FACE Sorghum Experiment

Preferred citation (DataCite format):

  Leavitt, Steven W; Cheng, Li; Williams, David G.; Brooks, Talbot; Kimball, Bruce A.; Pinter Jr., Paul J., et al. (2022).
  Carbon Isotope Data from 1998-1999 FACE Sorghum Experiment (2022).
  University of Arizona Research Data Repository.
  Dataset. https://doi.org/10.25422/azu.data.19216809


Corresponding Author:
  Steven W Leavitt, Lab. of Tree-Ring Research, sleavitt@email.arizona.edu


License:
  CC BY-NC 4.0


DOI:
  https://doi.org/10.25422/azu.data.19216809



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## Summary

These three files contain data on carbon and carbon isotopes in air, plants
and soils from the 1998-1999 Free-Air CO2 Enrichment (FACE) experiments
conducted at the Maricopa Agricultural Center, Arizona. The study traced the
movement of carbon from carbon dioxide in the atmosphere into plants, and then
into soils. These are the data used in a paper published in LAND (2022),
titled "Soil organic carbon isotope tracing in sorghum under ambient CO2 and
Free-Air CO2 Enrichment (FACE)"  
  
  
---

Experimental details are included in the Land publication and references therein.



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## Files and Folders

"Leavitt-LAND2022-Sorghum FACE Air-Tank 13C data.xslx": stable carbon isotope composition of the commercial ("tank") CO2 used to elevate CO2 concentration above ambient, and carbon isotope composition of CO2 in the air above the enriched (FACE) and ambient (Control) plots for both the 1998 and 1999 experiments.

"Leavitt-LAND2022-Sorghum Plant 13C data.xslx": stable carbon isotope composition of sorghum [leaf+stalk] whole-tissue samples pooled from several plants in each treatment for both the 1998 and 1999 experiments.

"Leavitt-LAND2022-Sorghum FACE SOC and 13C data.xslx": stable carbon isotope composition of soil organic carbon (mainly mineral-associated carbon with some fine particulate carbon) in each treatment for both the 1998 and 1999 experiments. The percent organic carbon (%) in all the soil samples was also determined.



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## Materials & Methods

Material and Methods are described in the Land (2022) paper.
Data in each of the files is fairly self-explanatory.



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## Additional Notes

The LAND publication is now available as open-access at https://doi.org/10.3390/land11020309

Leavitt, S.W.; Cheng, L.; Williams, D.G.; Brooks, T.; Kimball, B.A.; Pinter, P.J.; Wall, G.W.; 
Ottman, M.J.; Matthias, A.D.; Paul, E.A.; Thompson, T.L.; Adam, N.R. Soil Organic Carbon Isotope 
Tracing in Sorghum under Ambient CO2 and Free-Air CO2 Enrichment (FACE). Land 2022, 11, 309.
https://doi.org/10.3390/land11020309 

All authors were variously involved with planning, funding and execution of this experiment, field collections and observations, laboratory analysis, data analysis and writing.