Fig. 3
Linear regression of ground penetrating radar derived values for biomass (pixel count) and root fresh mass. Regression (a) is the general model in which all data samples were utilized, and regressions (b)–(d) are utilizing genotype-specific data (HMC-1, SM 1219-9, and TMS 60444 respectively). Regression equation, correlation coefficient, and coefficient of determination are provided for context