Research into the Establishment of Roadside Embankments1
- P. Henensal,
- G. Arnal and
- G. Puig
Three years of research by the Laboratories des Ponts et Chaussees in France on turfing roadside embankments indicated that the most suitable grasses for this purpose were Festuca ovina var. duriuscula A. Gray ex Port. and Coult., F. pseudovina, and chewings fescue (F. rubra var. commutata Gaud.). Two years after the initial fescue seeding (F. arundinacea Schreb.) was added to this list because it was found to be drought resistant. Perennial ryegrass (Lolium perenne L.), comprising more than 10 % of the polystand, greatly interfered with associated species, resulting in a poor appearance of the relevant test plots. The best polystand consisted of chewings fescue, F. ovina var. duriuscula, and colonial bentgrass (Agrostis tenuis Sibth.).
In the fertilizer evaluation during the 1st year of the experiment, a 10-10-10 formulation proved superior to the 10-20-10, 10-10-20, and 10-20-20 fertilizers. The percentage cover (Y, in all formulations) depended on the amount of fertilizer applied. This was positively related as Y = a Log X + b.
It appears that there is an incremental relation between shoot growth rate and the plasticity index, clay content, and “methylene-blue number;” at least up to a plasticity index of ≤ 25, a clay content of ≤ 38 %, and a methylene-blue value of ≤ 5 g.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 1980. . Copyright © 1980 by the American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, and International Turfgrass Society, 5585 Guilford Rd., Madison, WI 53711 USA