Erosion index (erodibility index)
(EI) The erosion (sometimes called erodibility) index is created by dividing potential erosion (from all sources except gully erosion) by the T value, which is the rate of soil erosion above which long term productivity may be adversely affected. The erodibility index is used in the conservation compliance and Conservation Reserve Programs. For example, one of the eligibility requirements for the CRP is that land have an EI greater than 8.
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