Table 7: Biomass regression models derived from stem density, ear density, stem area, height, and biovolume at the Gréoux experimental site. Note: means model significant at the 0.01 level of probability. The R2, RMSE, and RRMSE are averaged R2, RMSE, and RRMSE values of leave-one-out cross-validation methods.

VariablesR2RMSE (g/m2)RRMSE (%)

Stem density0.43 948.0

Ear density0.51 848.1

Plant height0.44 1109.8

Basal area0.64 777.3

Biovolume0.81 625.8

All0.85 585.1