Gypsum (CaS04) was applied to three varying types of soil environment. The plant life of two of these areas, Edinburg and Baxter Boulevard, showed the extreme effects of salt toxicity. The first experimental gypsum treatment was at Edinburg, a location of an outwash from a road salt storage facility. The average reduction in sodium levels after five years for the area was 74 percent after one 12 ton per acre application of gypsum. The second experimental gypsum treatment was applied to three widely separated plots along interstate Highway 95. These plots consisted of three replications of 0, 10 and 20 tons per acre treatments. The treated plots either showed a decrease or less of an increase in sodium levels than did the untreated plots. The third experimental treatment, Baxter Boulevard in Portland, consisted of three methods of applying gypsum which were surface, surface aerated, and subsurface treatment. These experimental treatments were at a rate of 10 tons per acre initially with a subsequent surface treatment one year later of five tons per acre. The maximum reduction of sodium levels was 87 percent for the 0 to 6 inch depth surface treatment, to a minimum reduction of 17 percent for the 12 to 18 inch depth subsurface treatment. /Author/

Media Info

  • Features: Appendices; References;
  • Pagination: 32 p.

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Filing Info

  • Accession Number: 00189467
  • Record Type: Publication
  • ISBN: )
  • Report/Paper Numbers: Technical Paper 78-4
  • Created Date: Apr 12 1979 12:00AM