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Measured volume using global thresholding with a 26-neighbor connectivity constraint and RooTrak. The volume was calculated by counting the number of voxels and multiplying by the voxels’ size cubed.
| Plant Species | Thresholding + Connectivity (Volume) | RooTrak (Volume) |
| mm3 | ||
| Wheat | 573.69 | 120.88 |
| Wheat | 558.75 | 76.94 |
| Wheat | 693.07 | 147.53 |
| Maize | 3,600.64 | 378.37 |
| Tomato | 270.24 | 22.58 |
| Tomato | 836.29 | 33.92 |
