The health condition of the Dutch forests in 1984.

Authors

  • W.M.J. den Boer
  • P.A. van den Tweel

DOI:

https://doi.org/10.18174/njas.v33i2.16863

Abstract

A nationwide survey of forest health in 1984 showed that 1.5% of all trees were dying, 8% were sick and 40% showed signs of reduced vitality (premature leaf-fall, etc.). Only 43.5% of conifers were healthy compared with 67% of broadleaves. Forests in most coastal regions and in the extreme NE were still over 90% healthy. Results suggest that air pollution is a more likely cause of the decline than drought, pests or fungal diseases, and furthermore that NH3 pollution from intensive livestock rearing may be partly involved. Since 1982 Diplodia pinea has appeared as a secondary pathogen of declining stands. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Published

1985-05-01

Issue

Vol. 33 No. 2 (1985)

Section

Papers

License

© Copyright KLV All rights reserved. The copyright covers the exclusive right to reproduce and distribute the contribution, including reprints, translations, photographic reproductions, microform, electronic form (offline, online), or any other reproductions of similar nature. The Author may publish his/her contribution on his/her personal Web page provided that he/she creates a link to http://library.wur.nl/ojs/index.php/njas and that together with this electronic version it is clearly pointed out, by prominently adding "© KLV", that the copyright for this contribution is held by KLV. The full-text version may be available from the Author's Web page only after a delay of 12 months following the publication of the paper, whereas such a delay is not required for the abstract.