Skip to main content

Effects of Sludge Disposal on Drainage Solutions of Two Forest Soils

Buy Article:

$29.50 plus tax (Refund Policy)


A study was made of the feasibility of sewage sludge disposal on Douglas-fir forest soils in western Washington. Fresh dewatered sludge (22.5 percent solids) was applied at 1,080 t/ha to deep gravelly and shallow loamy soils with or without Douglas-fir forest cover. Nitrate levels of soil drainage increased by two orders of magnitude over those of the background controls, but subsided below 10 ppm N in 3 years. The cleanup or renovation of leachates from sewage sludge by the soils was good, especially when under forest cover. However, nitrate production in the soils resulted in accelerated leaching and cation stripping. High water-absorption capacity of unincorporated sludge, along with poor drying characteristics, resulted in slow decomposition and mineralization rates, especially for sludge under forest cover. Biologically neutral chloride appeared to be the dominant anion in drainage from forested soils when mineralization rates for nutrient anions were low. Forest Sci 27:792-800.

Keywords: Douglas-fir; groundwater; nitrate; renovation; sewage; soil solution

Document Type: Journal Article

Affiliations: Assistant Professor of Forest Hydrology and Water Quality, University of Florida, Gainesville, FL 32611

Publication date: 1981-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
  • Submit a Paper
  • Membership Information
  • Author Guidelines
  • Podcasts
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more