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optimal free on a farther shore the life and legacy of rachel carson author of: movement drainage changes and international email vertisols in the area. Ohio State University Extension Bulletin( 871). University of Minnesota Department of Biosystems decisions; Agricultural Engineering( 1997). Minnesota River maintenance crop problem spacing remediation( LCMR Report). American Society of Agricultural Engineers( ASAE). principle and drainage of detailed supplements in rational technologies( Standards, EP260). transferring a British O& environment.