1. Phosphate minerals in a lateritic crust from Venezuela

   • H. Tiessen
   • S. Lo Monaco
   • C. Shang

   OriginalPaper Pages: 1 - 17

2. The fate of¹⁵N enriched throughfall in two coniferous forest stands at different nitrogen deposition levels

   • C. J. Koopmans
   • A. Tietema
   • A. W. Boxman

   OriginalPaper Pages: 19 - 44

3. ¹⁵N evidence for the origin and cycling of inorganic nitrogen in a small Amazonian catchment

   • Jay A. Brandes
   • Michael E. McClain
   • Tania Pen Pimentel

   OriginalPaper Pages: 45 - 56