ESTABLISHING AND MAINTAINING TURF ON STEEP SLOPES ALONG VIRGINIA HIGHWAYS

CROWNVETCH ESTABLISHMENT STUDIES REVEALED THAT THE BEST STANDS WERE OBTAINED WITH EARLY SPRING SEEDING. LIBERAL LIME TREATMENTS WERE BENEFICIAL ON SUNNY SLOPES WHERE MOISTURE STRESSES ARE OFTEN CRITICAL. WEEPING LOVEGRASS IN SEED MIXTURES IMPROVED CHANCES OF OBTAINING A RAPID GRASS COVER. THIS SPECIES IS EASIER TO ESTABLISH DURING LATE SPRING AND SUMMER MONTHS WHEN HIGH TEMPERATURE AND MOISTURE STRESS ARE COMMON. ON VERY ACID SITES, WEEPING LOVEGRASS WAS THE ONLY SPECIES THAT DEVELOPED AN EFFECTIVE SOD COVER WITH THE APPLICATION OF 4 TO 8 TONS OF HYDRATED LIME PER ACRE. EXPERIMENTS TO CONTROL EROSION ON WINTER- GRADED SITES INDICATED THAT THE MOST EFFECTIVE MULCH AND SEEDING TREATMENTS WERE STRAW MULCH WITH ASPHALT AND 2000 POUNDS OF WOODFIBRE PER ACRE; ONLY THE STRAW WITH ASPHALT PRODUCED A GOOD GRASS COVER THE FOLLOWING SPRING. THE LATTER TREATMENT GAVE THE BEST AND MOST UNIFORM POPULATIONS OF KENTUCKY 31 FESCUE, ANNUAL RYEGRASS, AND CEREAL RYE THE FIRST SPRING. IT WAS FOUND GENERALLY EASIER TO ESTABLISH VEGETATION WHEN TOPSOIL IS APPLIED TO THE SLOPE SURFACE. HOWEVER, SUCCESSFULL STANDS OF GRASS WERE OBTAINED WITH SEEDINGS ON PARENT MATERIAL SLOPES SOON AFTER GRADING. HIGH FERTILITY AND LIME GREATLY REDUCED WINTER-KILL OF FALL- SEEDED GRASSES. OBSERVATIONS REVEALED THAT THE USE OF UREAFORMALDEHYDE ON SEEDINGS 4 TO 6 YEARS OLD CONTINUED TO PRODUCE PERSISTENT TURF. HEAVILY-LIMED CROWN-VETCH STANDS CONTINUE TO PERSIST WITHOUT MAINTENANCE AFTER 12 YEARS. SEEDINGS OF VIRGINIA PINE, MULTIFLORA ROSE, AND MAPLE ON SHADED SLOPES WITH LOW FERTILITY RATES USING ANNUAL RYEGRASS AS A COMPANION SPECIES WERE SUCCESSFUL IN PIEDMONT, VIRGINIA. SCOTCHBROOM WAS ESTABLISHED FROM SEEDS ON BOTH SHADED AND SUNNY SLOPES USING SEVERAL COMPANION GRASSES AND FERTILITY LEVELS. DOGWOOD ESTABLISHMENT FROM SEED WAS NOT SUCCESSFUL. /FHWA/

  • Corporate Authors:

    Virginia Department of Highways

    Richmond, VA  United States  23219

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Woodruff, J M
    • Blaser, R E
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00204642
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jun 1 1971 12:00AM