Figure 4. Effect of soil moisture on the mean estimates ofg1 in respect to soil VWC (soil Volumetric Water
Content) categories (low VWC < 12%, medium VWC 12 – 16.99%
and high VWC ≥ 17% of 24h average of the Volumetric Water Content on
the day of measurement). Panel a represents closed canopy with n= 982 and panel b represents open canopy with n = 1604. Whiskers
extend to the largest or lowest value but no further than 1.5 times of
interquartile range above and below the hinges of the box plot with the
median. Any observations outside this range are denoted as individual
points. The horizontal line inside the box denotes the median of the
values.