| Recyear | | Physical quantity | Year that data was collected |
| RecMonth | | Physical quantity | Month that data was collected |
| RecDate | | Date/time | Date that data was collected |
| DaysSinceMay1 | | Physical quantity | The number of days since 1 May of that year |
| Strata | | Physical quantity | sample group |
| Status | | Nominal | On for grazed site, Off for site not grazer during observation |
| Biomass | | Physical quantity | Dried biomass(averaged across three sub-plots) of all vegetation in 0.1 m2 clipping extrapolated to g/m2 |
| CP | | Physical quantity | Graminoid crude protein content derived from NIRS analysis, percentage |
| DCP | | Physical quantity | Graminoid adjusted crude protein content derived from NIRS analysis |
| Watershed | | Nominal | Name of bison watershed that sample was collected |
| Green | | Physical quantity | Percentage of green of all vegetation in plot (averaged) |
| Grass | | Physical quantity | Percentage of grass in plot (averaged). |
| Forbs | | Physical quantity | Percentage of forbs in plot (averaged). |
| Litter | | Physical quantity | Percentage of litter in plot (averaged) |
| Burn | | Nominal | Whether or not watershed burned that spring |
