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iowadot.govAbout this-poster: OAK SAVANNAS Savannas are known for their scattered trees — Often large, wide-crowned oaks — that tower above a prairie groundcover. These "oak openings"

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Page 1: iowadot.govAbout this-poster: OAK SAVANNAS Savannas are known for their scattered trees — Often large, wide-crowned oaks — that tower above a prairie groundcover. These "oak openings"