. 2017 Mar 20;17(3):636. doi: 10.3390/s17030636

Table 2.

Comparison of silver maple (Acer saccharinum) sapwood area from [66] measurements and Equation (6) estimations in site 2 of the ASWP network.

Node	$d$ (cm) ^a	$A_{S}$ (%) ^b	$A_{t o t a l}$ (cm²) ^c	${\hat{A}}_{S}$ (cm²) ^d	${\hat{A}}_{S}$ (cm²) ^e
2045	34	77.4	839	650	700
2055	30.7	70	682	478	601
2065	31.5	76.7	719	552	633
2095	41.2	81.7	1250	1020	954
2115	24.3	83.1	415	345	394

^a based on hand measurements made in 2010; ^b based on the average of three core samples taken in 2010; ^c assumes 0.64 cm bark thickness; ^d based on the estimated percentage of sapwood area times the total trunk cross-sectional area; ^e based on the regression equation of [61] where $B_{0}$ = 2.052 and $B_{1}$ = 1.654.