Page 1 of 34 Forestry Measurement Techniques Measuring, Quantifying
Forestry Measurement Techniques Measuring, quantifying, and displaying forestry data. Reference for: WILD2400, WILD3850, WILD4750, WILD5700 (updated September 2019) Measuring trees to characterize stands or forests has its own unique set of tools and techniques. Because trees do not necessarily scale to forests to landscapes, etc., there are important considerations to make to accurately characterize trees and stands in the field. Generally, the data we collect have little meaning in and of themselves, they need to be tabulated, or displayed graphical to portray their meaning. These data are important if we want to make important silvicultural consideration with respect to characterizing, and/or treating the stand. This may be to portray wildlife habitat, quantify current volume, or to enhance future growth, among other things. This handout is a review of some essential measurement and quantification skills requisite for forestry, and really any natural resource professional tasked with characterizing trees and forests. We will define some basic concepts, show you how to make some simple tree- and stand-level measurements. Then we will show you how to use the data collected for quantitative assessment of: stand stocking, determining site index (site quality), stand density, species composition, and diameter/age distributions. I anticipate that you would keep this handout for future reference during your curriculum at USU, and that it might be a helpful reference in your future. Tree Measurements (direct) Crown Base (CB): Height to the base of live branches. Used to calculate live crown ratio (LCR). Typically measured with a Biltmore stick, clinometer, or hypsometer. Diameter at breast height (DBH): where breast height is 4.5 feet (or 1.3 m) off the ground.
[Show full text]