1. Foreword

   • R. M. Cox
   • D. F. Karnosky

   Special Section 01 April 1992 Pages: 187 - 187

2. Effects of genotype on the response of Populus tremuloides michx. To ozone and nitrogen deposition

   • D. F. Karnosky
   • Z. E. Gagnon
   • J. A. Witter

   Special Section 01 April 1992 Pages: 189 - 199

3. Geographic origin of Pinus sylvestris populations influences the effects of air pollution on flowering and growth

   • J. Oleksyn
   • W. Chalupka
   • P. B. Reich

   Special Section 01 April 1992 Pages: 201 - 212

4. The effects of wet deposition chemistry on reproductive processes in two pine species: Apparent pollination effectiveness in relation to species pollen sensitivity

   • R. M. Cox

   Special Section 01 April 1992 Pages: 213 - 226

5. Response of Picea abies (L.) Karst. Provenances to sulphur dioxide and aluminum: A pilot study

   • T H. Geburek
   • F. Scholz

   Special Section 01 April 1992 Pages: 227 - 232

6. Genetic implications in the decline of red spruce

   • D. H. De Hayes
   • G. J. Hawley

   Special Section 01 April 1992 Pages: 233 - 248

7. Genetic structure of a naturally regenerating Scots pine population tolerant for high pollution near a zinc smelter

   • W. Prus-Głowacki
   • R. Nowak-Bzowy

   Special Section 01 April 1992 Pages: 249 - 259

8. Ecological-genetic investigations in environmentally stressed mature sugar maple (Acer saccharum marsh.) populations

   • T H. Geburek
   • P. Knowles

   Special Section 01 April 1992 Pages: 261 - 268

9. Foliar sensitivity of eight eastern hardwood tree species to ozone

   • D. D. Davis
   • J. M. Skelly

   Special Section 01 April 1992 Pages: 269 - 277

10. Hydrochemical processes at a pristine site in nord-trøndelag, mid-Norway

    • Robert C. Ferrier
    • Hamish A. Anderson
    • Nils Christophersen

    Regular Section 01 April 1992 Pages: 281 - 302

11. Effective gas flow arrangements in soil venting

    • Dale Coffin
    • Larry Glasgow

    Regular Section 01 April 1992 Pages: 303 - 324

12. SO₂ and NH₃ deposition as possible causes for the extinction of Arnica montana L.

    • Fokke Fennema

    Regular Section 01 April 1992 Pages: 325 - 336

13. Hydrochemical budgets of a small forested granitic catchment exposed to acid deposition: The strengbach catchment case study (Vosges massif, France)

    • A. Probst
    • D. Viville
    • E. Dambrine

    Regular Section 01 April 1992 Pages: 337 - 347

14. Simultaneous determination of antimony and bismuth in soils by continuous hydride generation—atomic absorption spectrometry

    • Teruo Asami
    • Masatsugu Kubota
    • Sayuri Saito

    Regular Section 01 April 1992 Pages: 349 - 355

15. Announcements

    Announcement 01 April 1992 Pages: 357 - 357