Allometric Equations for Estimating Silk Oak (Grevillea robusta) Biomass in Agricultural Landscapes of Maragua Subcounty, Kenya

Table 18

Allometric equations for estimating BGB using combination of DBH and HT (DBHHT = P).

Function	Equation	MRE	R^2	SEE
Exponential	BGB = 4.95e^0.0006P	1.34	0.73	-1.45
Logarithmic	BGB = 24.24ln(P) – 76.22	0.01	0.72	0.75
Polynomial	BGB = -0.000P^2 + 0.255P–5.495	-1.01	1	0.69
Linear	BGB = 0.184P + 0.575	0.07	0.78	0.75
Power	BGB= 0.084P^1.125	3.06	0.99	0.75