Diameters (inches) of the largest three roots coming through panels of barrier materials. (Values in each box are from the same tree.)
| Species | T reatment | |||||
|---|---|---|---|---|---|---|
| Control | Fabric | Copper | Bio | Bio 2” | Bio 4” | |
| Hybrid | ||||||
| cottonwood | 1.012 | .212 | .225 | .400 | .175 | .375 |
| .838 | .200 | .212 | .325 | .175 | .200 | |
| Black | .750 | .200 | .175 | .300 | .162 | .188 |
| cottonwood | .562 | 175 | .265 | .350 | .162 | .425 |
| .525 | .125 | .225 | .188 | .162 | .300 | |
| Paper | .550 | .125 | .212 | .150 | .150 | .225 |
| birch | .550 | .088 | .125 | .000 | .000 | .000 |
| .438 | .075 | .125 | .000 | .000 | .000 | |
| .450 | .075 | .100 | .000 | .000 | .000 | |