Permanent vegetative cover refers to trees, perennial bunchgrasses and grasslands, legumes, and shrubs with an expected life span of at least 5 years.
In the United States, permanent cover is required on cropland entered into the Conservation Reserve Program.
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This article incorporates public domain material from Jasper Womach. Report for Congress: Agriculture: A Glossary of Terms, Programs, and Laws, 2005 Edition (PDF). Congressional Research Service.