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

Table 13

Allometric equations for estimating TTB using HT.

Function	Equation	MRE	R^2	SEE
Exponential	TTB = 3.090e^0.266HT	-37.50	0.54	10.10
Logarithmic	TTB = 315.7ln(HT) – 597.3	0.06	0.93	3.00
Polynomial	TTB = -0.0409HT^2 + 18.63HT + 132.7	0.21	0.99	2.52
Linear	TTB = 29.69HT- 198.0	0.02	0,74	2.55
Power	TTB= 0.401HT^.1.642	-5.44	0.97	0.53