IMPROVED ESTABLISHMENT AND MAINTENANCE OF ROADSIDE VEGETATION

RAPID, UNIFORM VEGETATIVE ESTABLISHMENT PRACTICES WERE EVALUATED IN 22 EXPERIMENTS CONDUCTED ON (1) LOAMY CLAY CUT SLOPE, (2) LOAM CLAY FILL SLOPE, (3) SANDY CUT SLOPE, (4) SANDY MEDIAN, AND (5) SANDY LOAM MEDIAN SITES. SEED MIXTURE STUDIES INDICATED THAT A MINIMUM OF 20%, ON A SEED NUMBER BASIS, EACH OF KENTUCKY BLUEGRASS, RED FESCUE, AND PERENNIAL RYEGRASS SHOULD BE INCLUDED AS THE BASIC COMPONENTS OF THE SEED MIXTURE. THE INCLUSION OF ONE BUSHEL PER ACRE OF CEREAL RYE WAS BENEFICIAL ON SANDY SOILS BUT DISTINCTLY DETRIMENTAL TO THE ESTABLISHMENT OF PERMANENT GRASS SPECIES ON FINE TEXTURE LOAM AND CLAY SOILS. THE OPTIMUM SEEDING RATE WAS BETWEEN 80 TO 100 POUNDS PER ACRE. ADEQUATE ESTABLISHMENT WAS ACHIEVED WITH SEEDINGS MADE FROM MAY 1 TO OCTOBER 10. THE APPLICATION OF A FINE TEXTURE TOPSOIL LAYER TO SANDY SOILS WAS ESSENTIAL FOR SUCCESSFUL ESTABLISHMENT AND MAINTENANCE OF A PERMANENT VEGETATIVE COVER. USE OF A FERTILE TOPSOIL USUALLY ELIMINATED THE NEED FOR POST-SEEDING FERTILIZER APPLICATIONS, PROVIDING ADEQUATE INITIAL ESTABLISHMENT WAS ACHIEVED. THE SOIL INCORPORATION OF 80 POUNDS PER ACRE OF NITROGEN, PHOSPHORIC ACID AND POTASH WAS THE BEST FERTILIZER. THE PREFERRED SEEDING TECHNIQUE INVOLVED ADEQUATE SOIL CULTIVATION FOLLOWED BY SHALLOW INCORPORATION OF THE SEED INTO THE SOIL AND ROLLING. ADEQUATE MULCHES WERE: (1) STRAW MULCH (2 TONS PER ACRE) PLUS ASPHALT (150 GALLSON PER ACRE), (2) SOIL RETENTION MAT OR EXCELSIOR, AND (3) WOOD CHIPS (9 TO 10 TONS PER ACRE). /AUTHOR/

  • Supplemental Notes:
    • 86004, Hpr-1(8)
  • Corporate Authors:

    Michigan Department of State Highways

    State Highways Building, PO Drawer K
    Lansing, MI  USA  48904

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Beard, J B
    • Fischer, J A
    • Kaufman, J E
    • MARTIN, D P
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00204641
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jun 1 1971 12:00AM