Table 3.

Estimated regression coefficients and adjusted standard errors (±SE), adjusted coefficient of determination (R ² _adj), model bias ($\stackrel{\circledR }{E}$), and root mean square error (±RMSE) of carbon equations.

System	Model	Parameter	Estimate	SE	R 2 adj(%)	$\stackrel{\circledR }{E}$ (%)	RMSE (%)
1	m1	b01	0.0108	0.0197	85.439	−0.541	19.550
		b11	1.9977	0.6440
		b21	1.0153	0.8218
	m2	b02	0.0110	0.0165	85.439	−0.542	19.550
		b12	1.0031	0.1578
2	m1	b01	0.0842	0.0960	90.663	−0.226	16.906
		b11	3.0889	1.0900
		b21	−0.8036	1.2927
	m2	b02	0.0322	0.0314	88.930	0.039	18.409
		b12	0.8663	0.1162
3	m1	b01	0.0382	0.0564	90.193	−0.920	19.920
		b11	1.8823	0.5867
		b21	0.6251	0.9013
	m2	b02	0.0282	0.0253	90.131	−0.859	19.982
		b12	0.8666	0.1083
4	m1	b01	0.0475	0.0344	94.868	−0.736	16.536
		b11	1.3937	0.6278
		b21	1.0498	0.8151
	m2	b02	0.0547	0.0285	94.831	−0.827	16.596
		b12	0.7950	0.0612