A 5-year evaluation of roadside mowing practices in Indiana was completed in 1976. Findings show that the first mowing cycle is the most critical. This mowing is wasted if done too early because the most rapid growth of grass occurs in early spring. If it is carried out too late or when the grass is wet, injury to the turf may result from piling up of grass and smothering. The optimum height for the first mowing cycle is between 46 and 61 cm (18 and 24 in). To prevent scalping and to avoid piling up and smothering of grass, the grass should be mowed to a height of at least 13 to 15 cm (5 to 6 in). The second cycle of three-cycle mowing is less critical and could be eliminated most seasons if the first cycle were delayed. The last cycle should be delayed so that no more than about 30 cm (12 in) of growth occurs before winter. This leaves the roads with a well-maintained appearance during the winter months and with enough growth to protect the grass from winter killing but not so much growth as to interfere with either fall or spring spraying for control of broadleaf weeds. Unmowed roadsides remained in good condition over the 5-year observation period when combined with the fall-spring spraying rotation for control of broadleaf weeds. A major problem was that brush began to take over in some areas. Addition of a brush-control agent (a three-way herbicide mixture of 2,4-D, dicamba, and Silvex) to the fall-spring spraying rotation for these areas or one-cycle mowing at least every other year is indicated. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 47-53
  • Monograph Title: Maintenance decision making and energy use, roadside and pavement management, and preferential bridge icing
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00193681
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 11 1979 12:00AM