Fig. 8From: An evaluation of inexpensive methods for root image acquisition when using rhizotronsRoot elongation (mm) in the daytime and at night, estimated using a time-lapse camera. Symbols: circles root elongation during the day, triangles root elongation during the night. For (a–s), each graph represents the elongation rate of one root randomly selected from a rhizotron throughout its entire lifespanBack to article page