GLBRC081: Stand Counts, Perennials
In use from 2009-01-01
Stand counts provide estimates of the percent and area covered by a target species. In herbaceous perennial plots, we use the Vogel-Masters stand count method. This protocol should be completed annually during the establishment phase.
Make or obtain a frequency grid. The grid is comprised of a metal or PVC frame, 75 cm x 75 cm, that has been divided into 25 cells, each 15 cm x 15 cm.
Place the grid on a random location on the plot. Avoid areas that are not representative of the plot (e.g., adjacent to sampling equipment, on plot edges). Count the number of cells that contain at least one plant of the target species. Flip the grid over, end-to-end, and count again. Repeat two more times, for a total of 4 counts (100 cells). Add the 4 counts together.
To get a frequency of occurrence, divide the total number of cells that contain the target plant by 100. To convert to an areal measurement (# plants/m2), divide the total number of cells that contain the target plant by 2.25.
Vogel, K.P. and R.A. Masters. 2001. Frequency grid: A simple tool for measuring grassland establishment. Journal of Range Management. 54: 653-655.