The root segmentation performed using X-ray CT images was validated using traditional destructive root length analyses. After the second scan, the cores; were opened and the soil was washed through a 1 mm sieve to collect roots. The roots were stored in ethanol until scanned on a flatbed scanner (Epson Perfection V850 pro) at 1200 dpi. The analysis of root length was done using the Rhizovision Explorer (V. 2.0.3 Seethepalli et al., 2021 (link)).
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