| Season | | Nominal | early (spring) or late (fall) stem density value |
| Year | | Physical quantity | year stem density was collected |
| Plot | | Physical quantity | plot: needs exact match with spcomp, stemdensity, ANPP tables |
| Sample | | Physical quantity | sample: number 1-40 |
| AndroL | | Physical quantity | number of live stems of Andropogon gerardii |
| AndroD | | Physical quantity | number of dead stems of Andropogon gerardii |
| AndroT | | Physical quantity | total number of stems of Andropogon gerardii |
| SorgL | | Physical quantity | number of live stems of Sorghastrum nutans |
| SorgD | | Physical quantity | number of dead stems of Sorghastrum nutans |
| SorgT | | Physical quantity | total number of stems of Sorghastrum nutans |
| SolidagoL | | Physical quantity | number of live stems of Solidago canadensis |
| SolidgoD | | Physical quantity | number of ldead stems of Solidago canadensis |
| SolidagoT | | Physical quantity | total number of stems of Solidago canadensis |
| GrassL | | Physical quantity | number of live other grass stems |
| GrassD | | Physical quantity | number of dead other grass stems |
| GrassT | | Physical quantity | total number of other grass stems |
| ForbL | | Physical quantity | number of live forb stems |
| ForbD | | Physical quantity | number of dead forb stems |
| ForbT | | Physical quantity | total number of forb stems |
| WoodL | | Physical quantity | number of live woody stems |
| WoodD | | Physical quantity | number of dead woody stems |
| WoodT | | Physical quantity | total number of woody stems |
