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

Table 17

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

Function	Equation	MRE	R^2	SEE
Exponential	AGB = 18.26e^0.0006P	-7.46	0.73	5.24
Logarithmic	AGB = 82.22ln(P) – 258.1	-6.88	0.72	2.31
Polynomial	AGB = -0.000P^2 + 0.829P–16.09	-2.9	1	1.85
Linear	AGB = 0.630P + 0.965	0.19	0.86	1.46
Power	AGB= 0.310P^1.119	3.837	0.99	1.52