PROBLEMS IN ESTABLISHING OR MAINTAINING VEGETATION ON ROADSIDES

TESTS WERE INSTALLED DURING 1968-70 TO INVESTIGATE THE MODIFICATION OF ROADSIDE SOIL MATERIALS RESTRICTED BY PHYSICAL OR CHEMICAL CHARACTERISTICS LIMITING PLANT GROWTH, TO DETERMINE THE UTILITY OF PLANT MATERIALS FOR ROADSIDE USE, AND TO DEVELOP CHEMICAL TREATMENTS FOR CONTROLLING UNWANTED VEGETATION. A PLASTICITY INDEX (PI) VALUE GREATER THAN 16 SIGNIFIES A POOR TENDENCY TOWARD GRANULATION AND OTHER PROPERTIES DESIRABLE IN A PLANT GROWTH MEDIUM. THIS PHYSICAL CONDITION CAN BE MODIFIED IN SOME, BUT NOT ALL, CASES BY ADMIXING AGRICULTURAL GYPSUM, CERTAIN CATIONIC POLYMERS AND POLYURETHANE. SEEDINGS IN TEXAS FOR EROSION CONTROL CAN BE EXTENDED TO THE 15-INCH ISOHYET PROVIDED THE SOIL MATERIAL IS SANDY, NOT EXTREMELY SALINE, AND COMPETITIVE PLANTS ARE CONTROLLED. PERENNIAL WEEDS GROWING IN SHOULDER PAVEMENTS WERE CONTROLLED BY PROGRAM SPRAYS OF FENAC/DICAMBA COMBINED WITH EITHER PROMETONE OR BROMANIL. MOWING ADJACENT TO MEDIAN PLANTINGS MAY BE FACILITATED BY A COMBINATION CONTACT-PRE-EMERGENCE TREATMENT. /AUTHOR/

  • Supplemental Notes:
    • Res Rept 142-1, 18 PP
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  USA  76011
  • Authors:
    • McCully, W G
    • Bowmer, W J
    • Stubbendieck, J L
  • Publication Date: 1970-12

Subject/Index Terms

Filing Info

  • Accession Number: 00205165
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Sep 19 1971 12:00AM