1. Editorial

   EditorialNotes Pages: v - vi

2. Reviewers for 1988 and 1989

   Acknowledgments Pages: vii - viii

3. Carbon and nitrogen cycling in North American boreal forests

   • Gordon B. Bonan

   OriginalPaper Pages: 1 - 28

4. El Nino effects on hydrogen ion concentration of a California reservoir

   • John G. McColl

   OriginalPaper Pages: 29 - 36

5. Porewater oxidation, dissolved phosphate and the iron curtain

   • Randolph M. Chambers
   • William E. Odum

   OriginalPaper Pages: 37 - 52

6. Effect of harvest intensity and ground flora establishment on inorganic-N leaching from a Sitka spruce plantation in north Wales, UK

   • P. A. Stevens
   • M. Hornung

   OriginalPaper Pages: 53 - 65

7. Nitrogen loss from deserts in the southwestern United States

   • William T. Peterjohn
   • William H. Schlesinger

   OriginalPaper Pages: 67 - 79