Use of organic amendments for revegetation of disturbed sites with adverse soil conditions.

Details

• Creators:
  Claassen, Vic ; Finn, Monica S.
• Corporate Creators:
  University of California, Davis. Dept. of Land, Air and Water Resources
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Revegetation
  • California
  • Roads
  • Embankments
  • Maintenance and repair
  • Soil conservation
  • Organic wastes as soil amendments
• Publication/ Report Number:
  CA06-0170 ; FHWA/CA/2001-2006/0170
• Resource Type:
  Tech Report
• Geographical Coverage:
  California
• Corporate Publisher:
  California. Dept. of Transportation. Division of Research and Innovation
• Abstract:
  Decomposed granite (DG) substrates are notorious for their ability to erode and ; produce sediment. This occurs because the granite particles that crumble out of a ; weathering rock have low cohesion and low pore space and low organic matter content. ; When wet, they settle into a dense mass with low infiltration. Rainwater runs over the ; top and cuts deep gullies. When dry, the materials form crusts or they hard-set. When ; they are rewetted and saturated, they can liquefy and slump. As a result of these ; characteristics, these substrates are erosive and unstable when wet, and when dry they ; are droughty, and restrict root growth. They typically have low nitrogen content for plant ; growth. As a result, revegetation success on DG substrates is poor. ; Serpentinitic substrates weather from rock with high magnesium and very low ; calcium content. On this material, many plant species cannot grow well because of the ; low calcium availability. These substrates typically have low clay content, and often ; have shallow soil depths, meaning that they are easily saturated and non-cohesive. For ; these reasons, serpentinitic substrates are also very erosive.
  More +
• Format:
  PDF
• Funding:
  65A0098
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27666/dot_27666_DS1.pdf
• File Type:
  [PDF - 578.60 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7c1ea2849b83dc53e88b81b905b596b14f28e088f0296ee0310c58e15ea1f4bf