ode> - crown ratio</p></li>
<li><p><code>ccfl [ft2 ft-2]</code> - crown competition factor of large trees</p></li>
</ul><p><b>Model Parameters</b></p><div class="sourceCode"><pre><code>  family   genus   species        b_0      b_2
1 Pinaceae Tsuga   heterophylla 0.791 -0.00256
2 Fagaceae Quercus garryana     0.362 -0.00648</code></pre></div><p></p><hr><code>rc = 1 - ((1)/(1 + exp(b_2 * ccfl)))</code><ul><li><p><code>rc [ft ft-1]</code> - crown ratio</p></li>
<li><p><code>ccfl [ft2 ft-2]</code> - crown comp