Allometric equations for estimating on-farm fuel production of Gliricidia sepium (Gliricidia) shrubs and Cajanus cajan (pigeon pea) plants in semi-arid Tanzania

Table 2 Allometric models for estimating the above-ground woody biomass of pigeon pea

Model no.	Regression coefficients			SEE	CF	p value	R² (%)	AIC
Model no.	a	b	c	SEE	CF	p value	R² (%)	AIC
1	43.691	2.590		*	*	**	88.5	**
2	1.377 *10^–5	3.022		*	*	**	39.7	**
3	5.989	2.459	0.376	*	*	**	88.9	**
4	3.753	2.604		0.159	1.013	< 0.001	91.4	− 292
5	− 7.18	2.281		0.418	1.091	< 0.001	40.6	− 138
6	0.918	1.283	0.367	0.164	1.014	< 0.001	90.9	− 286
7	− 1.459	1.014		0.178	1.016	< 0.001	89.2	− 274

a, b, c are constant numbers
*The standard error of estimate (SEE) and CF are not relevant for non-linear regression models
**The calculation of p values and AIC is not applicable for non-linear models

ISSN: 2192-0567