Four "slow release" fertilizers were evaluated as to their effect on the establishment and subsequent growth of plants along roadsides. The materials were added to backfill soil at planting. Plant survival appeared to be more important than annual increases in growth. High levels of fertilizer reduced the survival of all species. Viburnum dentatum was affected even at lower rates. The survival of Frazinus Pennsylvanica and Lonicera Morrowii was good, except at high fertilizer levels. Excess rainfall shortly after planting may have increased the concentration of dissolved fertilizer salts to toxic levels around the new roots. Those plants not killed immediately may have been weakened to the point where resistance to environmental stress was reduced. Further work is indicated in the selection of species that will tolorate the inherent low nutrient levels and stresses associated with highway sites or that will withstand and respond favorably to fertilizers applied at planting. /Author/

  • Supplemental Notes:
    • Sponsored by Indiana State Highway Commission and conducted in cooperation with DOT, Federal Highway Administration.
  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284
  • Authors:
    • Carpenter, P K
    • Hamilton, D F
    • NcNiel, R E
    • Levinskas, N
  • Publication Date: 1976-12-1

Media Info

  • Features: Figures; Tables;
  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00155967
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: JHRP-76-33 Intrm Rpt
  • Contract Numbers: HPR-1(14) Part II
  • Files: TRIS
  • Created Date: Aug 4 1977 12:00AM