Table 16.-Regression coefficients, standard errors, and R values for
estimating total elemental content of tree components.a
Species Component Element Bo Bi B1 S.E. R

Slash Foliage N 0.192 1.388 2.215 .169 .85
 P 3.543 1.080 2.075 .146 .86
 K 4.078 0.887 2.368 .157 .85
 Ca 4.038 1.505 1.369 .161 .80
 Mg 3.700 1.511 1.403 .157 .81
 Al 3.151 0.632 2.820 .188 .82
 Mn 3.150 1.090 1.255 .149 .77
 Zn 2.022 1.491 1.328 .157 .80


Slash Branches








Slash Bolebark








Slash Bolewood








Loblolly Foliage


1.351 2.713 0.385
2.438 2.683 0.657
2.867 2.915 0.239
3.490 3.025 -0.348
2.705 2.706 0.279
1.754 2.612 0.974
1.860 3.042 -0.759
1.329 2.772 -0.082

2.381 1.425 1.014
3.268 1.622 0.913
3.088 2.475 -0.115
4.505 1.407 0.618
3.696 1.610 0.478
3.111 1.328 1.819
2.668 1.787 -0.247
1.734 2.202 0.113

2.127 1.751 1.335
3.579 1.716 1.149
3.649 2.605 0.277
4.408 1.594 0.832
3.864 1.777 0.817
3.217 0.724 1.915
2.799 2.046 0.000
1.581 2.556 0.561

2.735 1.812 1.025
3.783 1.762 0.944
4.161 1.783 1.131
4.388 1.631 0.852
4.010 1.778 0.825
3.378 1.857 1.050
3.240 1.491 0.736
2.395 1.570 0.680


Loblolly Branches N 2.259 1.786 0.856 .172 .90
 P 3.359 1.823 0.927 .169 .91
 K 3.674 1.883 0.975 .195 .89
 Ca 4.372 1.643 0.674 .168 .89
 Mg 3.491 1.839 0.808 .172 .91
 Al 2.761 1.923 0.984 .206 .89
 Mn 2.765 1.479 0.656 .208 .82
 Zn 2.277 1.590 0.669 .212 .83
 aEquation of the form Log Y = Bo + B1 (Log Xi) + B2 (Log X2) where
Y = element content in grams; X1 = diameter outside bark groundline cm;
X2 = total tree height in meters.


.100 .92
.107 .92
.123 .90
.130 .86
.109 .91
.126 .91
.120 .86
.134 .85

.090 .90
.136 .82
.223 .65
.173 .66
.154 .72
.132 .87
.166 .62
.143 .79

.099 .92
.098 .91
.126 .87
.099 .88
.099 .89
.261 .62
.116 .81
.125 .89

.188 .89
.175 .90
.197 .89
.191 .87
.164 .91
.289 .80
.171 .87
.149 .90