00368914

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http://onlinepubs.trb.org...s/trr/1982/859/859-006.pdf

A fertilizer study illustrated the feasibility of discontinuing the use of loam in the construction of highway slopes in Maine. Protective grass sods can be established and maintained on subsoils devoid of organic matter through hydroseeding and subsequent top dressed fertilization. Spring and early summer seedings should be top-dressed in early fall, while late summer or early fall seedings may not require topdressing until the following spring. Research was also conducted to develop a practical way of establishing crown vetch on steep roadside slopes already in grass sod. Application of the transplanting method was limited to relatively small areas where the erosion hazard was great enough to justify the labor costs of hand planting. The crown vetch transplantings were successful at all highway sites studied and had vegetative spreading in excess of 122 cm within two years. A related study showed that, on slopes where equipment can be used, good establishment of both crown vetch and bird's-foot trefoil can be obtained by scarifying the surface of a grass sod prior to overseeding. The overseeding of bird's-foot trefoil (Empire) on relatively steep grassed slopes by using a herbicide (paraquat) was also studied. The herbicide reduced the competition from the initial ground cover and was advantageous in trefoil establishment. (Author)

Publication of this paper sponsored by Committee on Roadside Maintenance. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01411661

pp 19-24

1982

Transportation Research Record

0309033624

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Tables (8)

Fertilization (Horticulture); Grasses; Ground cover; Herbicides; Legumes; Roadside; Seeding; Slopes

Highways; Maintenance and Preservation; I61: Equipment and Maintenance Methods

TRIS, TRB

Jan 31 1983 12:00AM

• ENVIRONMENTALISM, PESTICIDE USE, AND RIGHTS-OF-WAY (ABRIDGMENT)
• HOW RESEARCH BENEFITS CALIFORNIA'S ROADSIDES (ABRIDGMENT)
• MONITORING WILDLIFE POPULATIONS AND ACTIVITY ALONG I-95 IN NORTHERN MAINE BEFORE, DURING, AND AFTER CONSTRUCTION
• MULE DEER BEHAVIOR IN RELATION TO FENCING AND UNDERPASSES ON INTERSTATE 80 IN WYOMING
• NYLON EROSION-CONTROL MAT (ABRIDGMENT)
• OPERATION AND MAINTENANCE OF SAFETY REST AREAS (ABRIDGMENT)
• REPORT FROM COMMITTEE ON ROADSIDE MAINTENANCE