Allometric Models for Estimating Tree Volume and Aboveground Biomass in Lowland Forests of Tanzania

Table 5

Parameter estimates and performance of general and site specific models for total tree aboveground biomass.

General/sites	Model	Parameter estimates			Error	RMSE		AIC
		General	6	0.6881					1.93834		0.237 × dbh^2.028	1280.4	0.49	893.98
7	3.2064		0.6166		0.176 × dbh^2.105	1326.16	0.48	892.70
8	0.3571		1.7440	0.4713	0.274 × dbh^1.982	1214.68	0.52	893.44
9	0.1459		0.8601		0.323 × dbh^1.940	1169.65	0.54	892.56
10	0.0873		0.9458		0.559 × dbh^1.673	567.9	0.87	840.94
Dindili forest	6	0.5414	2.0591		0.429 × dbh^1.801	539.98	0.83	421.38
	7	4.5076	0.6915		0.347 × dbh^1.860	506.59	0.84	421.40
	8	0.2137	1.8004	0.6724	0.573 × dbh^1.686	470.50	0.87	416.48
	9	0.1568	0.8613		0.585 × dbh^1.683	478.61	0.87	415.06
	10	0.1014	0.9510		0.638 × dbh^1.675	467.52	0.89	418.34
Rondo forest	6	0.3238	2.0673		0.040 × dbh^2.430	1360.97	0.50	450.04
	7	0.2816	1.1654		0.006 × dbh^2.916	1514.67	0.51	442.78
	8	0.0542	1.3326	1.4278	0.165 × dbh^2.010	967.08	0.66	439.90
	9	0.0863	0.8544		0.040 × dbh^2.397	1172.15	0.58	440.64
	10	0.07511	0.9477		0.214 × dbh^1.780	462.47	0.92	396.58