| RecType | | Physical quantity | Record type |
| Plot_2017 | | Nominal | Plot designation in 2017, after irrigation lines were shifted |
| RecYear | RecYear | Physical quantity | Year of record |
| Month_g | | Nominal | Month of green leaf sample collection
|
| Month_s | | Physical quantity | Month of senesced leaf sample collection
|
| Current | | Nominal | Treatment in 2017, after irrigation lines were shifted. |
| Transect_1993 | | Nominal | Previous treatment (1991-2016)
|
| 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' |
| Plot_1992 | | Nominal | Plot designations in 1992, while second irrigation line was being added. These plot designations are not typically used
|
| 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
|
| PercentC_g | | Physical quantity | Percent C of green A. gerardii leaf as determined on a C/N analyzer
|
| PercentN_g | | Physical quantity | Percent N of green A. gerardii leaf as determined on a C/N analyzer
|
| PercentC_s | | Physical quantity | Percent C of senesced A. gerardii leaf as determined on a C/N analyzer
|
| PercentN_s | | Physical quantity | Percent N of senesced A. gerardii leaf as determined on a C/N analyzer. This is also N resorption proficiency |
| res_eff | | Physical quantity | N Resorption efficiency (PercentN.g - PercentN.s ) / PercentN.g * 100 |
