| RecType | | Physical quantity | Record type |
| RecDate | | Date/time | Date that data was collected |
| Flux | | Physical quantity | Soil CO2 flux measured by a LI-6800, in μmol/m2/s
|
| Current | | Nominal | Treatment in 2017, after irrigation lines were shifted. |
| Replicate | | Nominal | Irrigation line: (A) started in 1991, (B) started in 1993. |
| Replicate_ed | | Nominal | Irrigation lines as in "Replicate", but divided into uplands and lowlands to yield spatial "blocks". |
| Transect_1993 | | Nominal | Previous treatment (1991-2016). |
| Plot_1993 | | Nominal | Plot designation 1991-2017, before irrigation lines were shifted. Plots that are currently in the reduced (R) treatment did not have plot numbers during this time
|
| Plot_1992 | | Nominal | Plot designations in 1992, while second irrigation line was being added. These plot designations are not typically used.
|
