Quick/cheaper stand assessments.

Abstract

Sampling and measurement techniques exist for reducing the effort/cost associated with standard timber stand assessments depending on the quantities of interest as well as the volume table(s) being used. This paper will introduce and consider the application of standard variable-radius plot sampling, double (two-phase) sampling, a new technique called Big-BAF sampling, and assorted shortcut measurement and observation techniques as they apply to Lake States forestry practice. The relative efficiencies of the techniques are also discussed. The paper is written for individuals who supervise or plan or conduct timber stand assessments for their organization. A basic understanding of the conduct of timber stand assessments using standard methods (e.g. line-plot cruises) is assumed. The paper could be the basis for a short course; hands-on activities, including a field exercise, are suggested. Spreadsheet code implementing many of the calculations presented in the paper is also available.