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Data sets reveal long-term trends as follows:

  • A significant decline in soil solution SO4 and S uptake which is consistent with the reduction in S deposition as a result of emissions control policies.


  • A significant decline in soil solution K+ in the majority of the Level II plots, possibly due to enhanced K leaching and/or uptake in response to management intervention.


  • Variable NO3 in soil solution, with a distinct increase in NO3 observed in peat soils under Sitka spruce.


  • The first signs of recovery from soil acidification at previously polluted sites.
  • Soil acidification at a site with high N deposition from local sources.

What’s of interest

Ten Years of Intensive Environmental Monitoring in British Forests (PDF-1295K)
Foresty Commission Information Note 88

Soil sustainability
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Soil sustainability