Timeless Heritage; A History of the Forest Service in the Southwest
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from ... Show synopsis This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1988 edition. Excerpt: ...leases and number of livestock (selected years, 1909-58) The Three-Step Method Kenneth W. Parker, a range conservationist (in research) explained the complex interrelationships that exist in determining range conditions and trends. "We are dealing," he said, "not only with the influence of livestock, but with a complex set of factors relating to the vegetation, soil, and native animals both large and small and even micro-fauna, especially in the soil, which are constantly changing from one growing season to the next." Parker advised using a three-step method that had been heartily endorsed by the region's administrative staffs. As defined by Parker, this method operates as follows: The three-step method incorporates the best features of several measurement methods--reduced to as simple a record as practicable for the purpose of measuring trend. As the name implies it consists of three major steps. Step One is concerned mainly with the establishment on the range of permanently marked transects and the collection of the basic field data from these transects and from the site within which they are located. Step Two consists of the field analysis of these data, classification of condition at time of record and estimation of current range trend. Step Three is concerned with a permanent photographic record of range conditions on the site that is sampled... all three steps are repeated and the results compared step by step in any subsequent examination in later years. In 1973, Reppert and Francis, of the Rocky Mountain Forest and Range Experiment Station staff, expanded on the Parker method by reporting on the development of a fivephase approach to interpret trends in range condition.64 The three-step method and other recommended...
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