| RecType | | Physical quantity | Record type |
| Plot_2017 | | Nominal | Plot designation in 2017, after irrigation lines were shifted |
| Current | | Nominal | Treatment in 2017, after irrigation lines were shifted. |
| Position | | Nominal | Landscape position in the upland or lowland |
| 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
|
| Date_collected | | Date/time | Date of soil collection |
| Date_enzymes | | Nominal | Date enzyme assays were conducted |
| Batch | | Physical quantity | Batch samples were run in |
| Wet | | Physical quantity | Wet wt of soil sample used |
| GWC | | Physical quantity | Gravimetric water content: field water content in grams water gram soil after drying overnight at 105 degrees C. |
| Dry_wet | | Physical quantity | Dry/wet conversion |
| Phos | | Physical quantity | Activity of phosphatase (nmol/gDrySoil/h) |
| BG | | Physical quantity | Activity of B-glucosidase (nmol/gDrySoil/h) |
| NAG | | Physical quantity | Activity of N-acetylglucosaminidase (nmol/gDrySoil/h) |
| CBH | | Physical quantity | Activity of cellobiohydrolasen(nmol/gDrySoil/h) |
| LAP | | Physical quantity | Activity of leucyl aminopeptidase (nmol/gDrySoil/h) |
| cndemand | | Physical quantity | log(BG) / (log(NAG) + log(LAP))
|
