1. Reconsidering the functions of latex

   • J. Robert Hunter

   Review Pages: 1 - 5

2. Intracanopy variation in nitrogen cycling through leaves is influenced by irradiance and proximity to developing fruit in mature walnut trees

   • Steven A. Weinbaum
   • Tom T. Muraoka
   • Richard E. Plant

   Original Articles Pages: 6 - 11

3. Nitrate reductase and glutamine synthetase activities in relation to growth and nitrogen assimilation in red oak and red ash seedlings: effects of N-forms, N concentration and light intensity

   • Benoit Truax
   • France Lambert
   • Normand Chevrier

   Original Articles Pages: 12 - 18

4. Nitrogen metabolism of Douglas fir and Scots pine as affected by optimal nutrition and water supply under conditions of relatively high atmospheric nitrogen deposition

   • Marta Pérez-Soba
   • Pieter H. B. de Visser

   Original Articles Pages: 19 - 25

5. The establishment of stem nutrient distribution zones of European larch and tamarack using principal component analysis

   • Robert Myre
   • Claude Camiré

   Original Articles Pages: 26 - 34

6. Formation and vertical distribution of sapwood and heartwood in Cryptomeria japonica D. Don

   • K. C. Yang
   • Y. S. Chen
   • G. Hazenberg

   Original Articles Pages: 35 - 40

7. Phenological and growth patterns of the Mediterranean oak Quercus suber L.

   • Graça Oliveira
   • Otília Correia
   • Fernando M. Catarino

   Original Articles Pages: 41 - 46

8. Breakage of hollow tree stems

   • C. Mattheck
   • K. Bethge
   • P. W. West

   Original Articles Pages: 47 - 50

9. Shedding of older needle age classes does not necessarily reduce photosynthetic primary production of Norway spruce

   • Wolfram Beyschlag
   • Ronald J. Ryel
   • Christian Dietsch

   Original Articles Pages: 51 - 59