Permanent Forest Plot Project (PFPP) - EREN

21.37 m1.37 m1.37 m1 m1.37 m1.37 m1.37 m.1.37 m.1.37 m.1.37 m.0.45 m1.37 m0.9 mor more1.37 m.Figure 1: Measuring dbh on irregular trees. 1.37 m = 4.5 ft; (Modified from U.S. Forest Service)Note: It is very important for biomass and carbon sequestration estimates that DBH is measured at a consistent height on the stem.Accurate height measurement may be facilitated by marking DBH on the stem with lead free paint or survey crayons, or by using aphysical guide. See “EREN PFPP Complete Protocol” for some methods of ensuring repeatable DBH measurements.Modified from “Measurement_of_Tree_Diameter” (New Mexico State University FFA Forestry) and “Condensed tree measurement for Ordway”(Macalester College). EREN PFPP Version 1.04 (June 2012)