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Universal Soil Loss Equation Dedicated as ASAE Historic Landmark. (Inside ASAE).

Plaque dedication ceremonies were held April 25, 2003, at Purdue University in Lafayette, Ind., to dedicate the Universal Soil Loss Equation, A= R K L S C P, as the 41st ASAE Historic Landmark.

The Universal Soil Loss Equation (USLE) was developed at the USDA National Runoff and Soil Loss Data Center at Purdue University in a national effort led by Walter H. Wischmeier and Dwight D. Smith. The USLE was published in 1965 in the USDA Agriculture Handbook 282.

The USLE is based on extensive erosion data from studies throughout the United States and provides a quick approach to estimating long-term average annual soil loss (A). The equation is comprised of six factors: R - rainfall and runoff; K - soil erodibility; L - slope length; S - slope steepness; C - cover and management; and P - support practice. USLE was the first empirical erosion equation that was not tied to a specific region of the United States, thus the title "Universal" Soil Loss Equation.

The USLE has been used in more than 100 countries to guide conservation planning, assess soil erosion for conservation policy development, and estimate sediment yield. It has helped to save millions of tons of soil, thus helping to feed the world's population and protect the environment from sediment produced by soil erosion.

Former ASAE President and Purdue University Associate Dean of Engineering Larry Huggins presented the plaque on behalf of ASAE.

The Historic Landmark plaque will be permanently displayed at the USDA-ARS National Soil Erosion Research Laboratory at Purdue University.

The ASAE Historic Landmark activity was established to commemorate significant past accomplishments. For a complete listing of all the ASAE Historic Landmarks, visit
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Title Annotation:American Association of Agricultural Engineers dedicate plaque
Publication:Resource: Engineering & Technology for a Sustainable World
Article Type:Brief Article
Geographic Code:1USA
Date:Jul 1, 2003
Previous Article:Spreading the Word about standards projects. (Standards).
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