1. Factors involved in potential sulfur accumulation in litter and soil from a coastal pine forest

   • M. E. Watwood
   • J. W. Fitzgerald
   • E. R. Blood

   OriginalPaper Pages: 3 - 19

2. The decline of lead in tree rings of Carya spp. in urban Atlanta, GA, USA

   • H. L. Ragsdale
   • C. W. Berish

   OriginalPaper Pages: 21 - 29

3. Mineralization of N and P along a trophic gradient in a freshwater mire

   • J. T. A. Verhoeven
   • M. M. Kooijman
   • G. Van Wirdum

   OriginalPaper Pages: 31 - 43

4. Rates and pathways of nitrous oxide production in a shortgrass steppe

   • W. J. Parton
   • A. R. Mosier
   • D. S. Schimel

   OriginalPaper Pages: 45 - 58

5. Differentiation of some Venezuelan blackwater rivers based upon physico-chemical properties of their humic substances

   • Teresa Vegas-Vilarrúbia
   • Jorge E. Paolini
   • Juan Garcia Miragaya

   OriginalPaper Pages: 59 - 77