Table 2.

Regression growth model obtained by actually measured data and by predicted data based on height and greenness measured by optical sensors.

Species	Equation		R2
Picea abies L.	Actually measured	Biomass = 0.00002 × Time1.8344	0.93
	Predicted based on greenness	Biomass = 0.00004 × Time1.5931	0.77
Pinus sylvestris L.	Actually measured	Biomass = 0.00003 × Time1.8447	0.88
	Predicted based on greenness	Biomass = 0.00004 × Time1.7889	0.93
Fagus sylvatica L.	Actually measured	Biomass = 0.0009 × Time1.6366	0.95
	Predicted based on greenness	Biomass = 0.1384 × ln(Time) – 0.2741	0.67
	Predicted based on plant height	Biomass = 0.0012 × Time1.5317	0.77
Quercus ilex L.	Actually measured	Biomass = 0.00007 × Time2.2141	0.92
	Predicted based on greenness	Biomass = 0.3118 × ln(Time) – 0.884	0.95
	Predicted based on plant height	Biomass = 0.0005 × Time1.6824	0.69

Models estimate biomass values at a certain time (day).