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This Concept Map, created with IHMC CmapTools, has information related to: 6b. Stand density indexes, Measurable stand characteristics affected by Competition*, Crown competition factor is the Sum of crown areas per area divided by sum of the crown areas for the trees if each were grown in isolation or open grown, Area occupied by comparibly sized trees Wilson's percent of height (PH), comparitive crown dimension Crown competition factor, Crown competition factor requires an DBH - Crown width equation, Stand Density* expressed in terms of Measurable stand characteristics, Stand Density* is an Absolute, quantitative measure of tree occupancy, Growing stock indexed with Stand Density*, <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> A= </mtext> <mmultiscripts> <mtext> b </mtext> <mtext> 0 </mtext> <none/> </mmultiscripts> <mtext> ⋅N+ </mtext> <mmultiscripts> <mtext> b </mtext> <mtext> 1 </mtext> <none/> </mmultiscripts> <mtext> ⋅∑D+ </mtext> <mmultiscripts> <mtext> b </mtext> <mtext> 2 </mtext> <none/> </mmultiscripts> <mtext> ⋅∑ </mtext> <mmultiscripts> <mtext> D </mtext> <none/> <mtext> 2 </mtext> </mmultiscripts> </mrow> </math> where <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> A= area covered by N number of trees
D=diameter at breast height
Sigma= summation over trees 
b0 -b2 = coeffiicients solved with least
squares regression </mtext> <mmultiscripts> <mtext> </mtext> <mtext> </mtext> <none/> </mmultiscripts> </mrow> </math>, Tree-area ratio could also be considered comparitive crown dimension, Occupancy regardless of Site, Basal area is the <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> Area summation of </mtext> <mmultiscripts> <mtext> D </mtext> <none/> <mtext> 2 </mtext> </mmultiscripts> <mtext> </mtext> </mrow> </math>, Measurable stand characteristics include Area occupied by comparibly sized trees, Basal area not ideal Area occupied by trees for a given basal area per tree changes with age, Occupancy regardless of Age, Fraction of an acre trees would cover if growing at normal density based on assumption that Ground covered by a tree is a second-degree polynomial of diameter at breast height, Fraction of an acre trees would cover if growing at normal density calculated with a predetermined equation, Crowding ideally, indicates same level of Occupancy, equation <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> A= </mtext> <mmultiscripts> <mtext> b </mtext> <mtext> 0 </mtext> <none/> </mmultiscripts> <mtext> ⋅N+ </mtext> <mmultiscripts> <mtext> b </mtext> <mtext> 1 </mtext> <none/> </mmultiscripts> <mtext> ⋅∑D+ </mtext> <mmultiscripts> <mtext> b </mtext> <mtext> 2 </mtext> <none/> </mmultiscripts> <mtext> ⋅∑ </mtext> <mmultiscripts> <mtext> D </mtext> <none/> <mtext> 2 </mtext> </mmultiscripts> </mrow> </math>, Average spacing (S) between trees divided by average tree height (H) PH=S/H×100