Handbook for Converting Parker Loop Frequency Data to Basal Area

摘要

The handbook provides the land manager a step-by-step method of convertingpreviously collected Parker 3/4-inch loop frequency data for grass species to a data type easily interpreted from an ecological perspective. The procedure is not intended for shrubs. Conversion allows comparison of the abundance of different species within years, as well as changes in the same species between years. Use of the method can then provide a data history of changes in grassland populations that can be incorporated into future monitoring programs. Future programs should not include the Parker method; newer field methods for determining basal area changes in grassland populations should be used.