Fig. 5From: Methodology: non-invasive monitoring system based on standing wave ratio for detecting water content variations in plantsStanding wave ratio (SWR) changes for live and dead Radermachera sinica with or without illumination. The frequency was measured at a specific frequency of 1.611 GHz. SWR measurements were also performed 3 h post-watering. Circles indicate the sampling point for obtaining dry weight measurementsBack to article page