Evaluation of soil resources for sustained vegetative cover of cut-slopes along I-70 near Straight Creek.

Details

• Creators:
  Claassen, Vic
• Corporate Creators:
  Colorado. Dept. of Transportation. Research Branch
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Decomposed Rock Interstate Highways Native Plants Nitrogen Revegetation Slope Stability Soil Components Soil Stabilization Vegetation Control
• Publication/ Report Number:
  CDOT-2013-14
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. Dept. of Transportation
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION ; NTL-ENERGY AND ENVIRONMENT-ENERGY AND ENVIRONMENT
• Abstract:
  Revegetation of high elevation decomposed granite cut-slopes often requires repeated applications of soil
  
  amendments to attain sustained vegetative cover. Plant transects from slopes west of the Eisenhower Tunnel from
  
  2007 to 2012 showed that cover was generally stable during this period. Soil fertility tests indicated that nutrients are
  
  generally low but still comparable to disturbed-but-revegetated reference plots. Soil organic matter and slow-release
  
  forms of nitrogen (N) may be a potential limiting factor. The N release rates of several common CDOT soil
  
  amendments were evaluated in a multi-year, field incubation experiment. Test results indicate a wide range of N
  
  release availability from nearly immediate to fairly slow release rates. Of the slow-release materials, about 74 % of
  
  total N content was released the first growing season, another 7 % in the following two years, while about 19 % was
  
  still retained in a more stable organic matter form at the end of the experiment. The study suggests that after several
  
  applications of slow-release amendments, vegetative cover on these cut-slopes is stabilizing.
  
  
• Format:
  PDF
• Funding:
  30.02
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:cb5dfd36a30881fb403ec7ecead5162f644641380d89433b5e226fb09462c596a7a867441065ec0b682c00f24fe0afebc9ab4206456e9d53d0495cc1f8520bb7
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26180/dot_26180_DS1.pdf
• File Type:
  [PDF - 2.18 MB ]