Table 5 Biomass equations used, exemplified with parameters for beech (Fagus sylvatica)

Above-ground biomass (kg), dbh > 10 cm

y = b₀*e^b1(dbh/(dbh + k1))*e^b2(d03/(d03 + k2))*h^b3

y = 0.16787*e^6.25452*(dbh/(dbh + 11))*e^6.64752*(d₀₃/(d₀₃ + 135))*h^0.80745

Above-ground biomass (kg), dbh < 10 cm and h > 1.3 m

y = b₀ + ((b_s − b₀)/d_s² + b₃(dbh – d_s))*dbh²

y = 0.09644 + ((33.22328 – 0.09644)/10 ² + 0.01162*(dbh – 10))*dbh²

Below-ground biomass (kg)

y = b₀*dbh^b

y = 0.018256*dbh^2.321997

Height function

h = 1.3 + 1(a + b/d_1.3)⁻³

h = 1.3 + 1(0.29397 + 1.76894/d_1.3)⁻³

Diameter in 30% tree height, d₀₃

d₀₃ = c₀*d_1.3^c1

d₀₃ = 0.84014*d_1.3^0.9897