Fig. 4. Linear regression comparing total root biomass per core and root biomass estimated with GPR, which has been adjusted to account for fertilizer effects on signal magnitude. Dashed lines represent the 95% confidence interval.
Fig. 4. Linear regression comparing total root biomass per core and root biomass estimated with GPR, which has been adjusted to account for fertilizer effects on signal magnitude. Dashed lines represent the 95% confidence interval.