Determination should include using the following steps:

TPA = trees x expansion factor 
Example: Suppose you acquired data on two 1/20th acre plots
(i.e., you sampled a tenth of an acre total, or 1/20 + 1/20)
Suppose that between the two plots there were 11 total trees:

Teacher Resource: Lesson 10: Basic Inventory Calculations, Virtual Cruiser Vest, The Rural Technology Initiative, Washington State University

Process/Skill Questions: