THE ESTABLISHMENT OF VEGETATION ON NONTOPOILED HIGHWAY SLOPES IN WASHINGTON

THE ELIMINATION OF THE USE OF TOPSOIL OVER SUBSOILS TO ESTABLISH VEGETATIVE EROSION CONTROL IS DISCUSSED. THE USE, COST AND EROSION PROBLEMS OF USING TOPSOIL, WHICH LEAD TO THIS PROJECT, ARE DISCUSSED. GRASS AND LEGUME SPECIES WERE TESTED ALONG WITH MULCHING MATERIALS SUCH AS WOOD CELLULOSE FIBER, STRAW, ASPHALT, NETTING MATERIALS, EXCELSIOR MATS, JUTE MESH, ETC. FERTILIZERS WERE TESTED AND REFERTILIZATION WAS FOUND TO BE A KEY FACTOR IN ESTABLISHING GOOD SOD ON SUBSOILS. THE TESTS ALSO SHOWED THE IMPORTANCE OF THE USE AND SELECTION OF MULCH MATERIALS. STRAW PLUS ASPHALT EMULSION AND EXCELSIOR MATTING PROVED TO BE THE MOST EFFECTIVE MULCHES FOR THE FASTEST SOD FORMATION BY PROVIDING THE BEST COMBINATION MICRO ENVIRONMENT, AND AT THE SAME TIME, SLOPE PROTECTION FROM EROSION. WITH PROPER SITE PREPARATION, TIMING, SOILS ANALYSIS, AND SPECIFICATIONS TO FIT, EXCELLENT TURFS WERE ESTABLISHED ON NEAR STERILE SUBSOILS WITHOUT THE USE OF TOPSOIL. /AUTHOR/

  • Supplemental Notes:
    • Rept No Y-1009
  • Corporate Authors:

    Washington State Department of Highways

    Olympia, WA  USA 

    Washington State University, Pullman

    Department of Civil and Environmental Engineering
    P.O. Box 642910
    Pullman, WA  USA  99164-2910
  • Authors:
    • Goss, R L
    • Blanchard, R M
    • Melton, W R
  • Publication Date: 1970-11

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00205257
  • Record Type: Publication
  • Report/Paper Numbers: Final Rept
  • Files: TRIS, STATEDOT
  • Created Date: Jul 16 1974 12:00AM