MULCH EVALUATION AND MANAGING VEGETATION IN MEDIANS

Best erosion control and vegetiation were obtained with straw mulch and all wood or paperfiber mulches were suitable as tacking agents at rates of 750 lb/A. When used alone, standard woodfiber generally gave better vegetative cover than paperfiber; however, all fiber mulches were acceptable when applied at 1,500 or 2,500 lb/A. Sparse grass stands in medians were improved before and after one spring mowing by the application of N at 50 or 100 lb/A; in later winter, responses from area formaldehyde were nil. Grass canopies along mowed areas often became thin and weedy because of low soil fertility; they may be improved temporarily by N fertilization or permanently by seeding perennial legumes, crownvetch (Coronilla varia), flatpea (Lathyrus sylvestris) and/or sweetpea (Lathyrus latifolius). Legumes may be successfully established when broadcast seeded in late winter-early spring into existing sod with a loose, roughened soil surface or by no-till sod seeding when legumes are placed in the soil. In dense grass sods, herbicides banded over the rows usually improve stands and growth of legumes. With dense stands of temperate grasses, as tall fescue, it is practical to mow once during the season when delaying the first mowing until about 50 percent of the seedheads emerge. Sparse grass canopies with weedy annual and perennial species need to be mowed a second or third time to maintain a "groomed" appearance. Principles of mowing temperate grasses and grass-legume mixtures are given in the report. Sampling soil in areas in need of renovation is strongly recommended to ascertain the lime, phosphorus, and potassium needs. Sampling studies show large variations in the mineral nutrient status among and within cut and fill slopes and medians. Soil analyses reduce renovation costs by restricting fertilizers applied to only those needed. (FHWA)

  • Record URL:
  • Corporate Authors:

    Virginia Polytechnic Institute and State University, Blacksburg

    Department of Agronomy
    Blacksburg, VA  United States  24061

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Virginia Department of Highways

    Traffic and Planning Division, 1221 East Broad Street
    Richmond, VA  United States  23219
  • Authors:
    • McIlvaine, P J
    • Blaser, R E
    • Adams, P P
  • Publication Date: 1980-7

Media Info

  • Pagination: 100 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00329737
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-VA-81-5 Final Rpt.
  • Contract Numbers: PR-PL-1(15)
  • Files: NTL, TRIS, USDOT, STATEDOT
  • Created Date: Mar 12 1981 12:00AM