1. Comparison of three different methods of determining soil sulphur mineralization in relation to plant sulphur availability in soils

   • J. Pamidi
   • K. Goh
   • R. McLaren

   Original Paper Pages: 131 - 139

2. Influence of organic and inorganic phosphorus supply on the maximum secretion of acid phosphatase by plants

   • R. Yadav
   • J. Tarafdar

   Original Paper Pages: 140 - 143

3. Soil enzymatic response to addition of heavy metals with organic residues

   • Engracia Madejón
   • Pilar Burgos
   • Francisco Cabrera

   Original Paper Pages: 144 - 150

4. Phosphatase activity, microbial phosphorus, and fine root growth in forest soils in the Sierra de Gata, western central Spain

   • Knut Schneider
   • Maria-Belen Turrion
   • Juan F. Gallardo

   Original Paper Pages: 151 - 155

5. Evaluation of a new approach to the nitrogen-15 isotope dilution technique, to estimate crop N uptake from organic residues in the field

   • Rebecca Hood

   Original Paper Pages: 156 - 161

6. Does shelterwood harvesting have less impact on forest floor nutrient availability and microbial properties than clearcutting?

   • Robert L. Bradley
   • Brian D. Titus
   • Karen Hogg

   Original Paper Pages: 162 - 169

7. Structure of nematode communities in forest soils of southern British Columbia: relationships to nitrogen mineralization and effects of clearcut harvesting and fertilization

   • T. Forge
   • S. Simard

   Original Paper Pages: 170 - 178

8. Arginine ammonification assay as a rapid index of gross N mineralization in agricultural soils

   • Torben A. Bonde
   • Tommy Nielsen
   • Jan Sørensen

   Original Paper Pages: 179 - 184

9. Influence of Cognettia sphagnetorum (Enchytraeidae) on birch growth and microbial activity, composition and biomass in soil with or without wood ash

   • Mira Liiri
   • Heikki Setälä
   • Hannu Fritze

   Original Paper Pages: 185 - 195

10. Sewage sludge effects on soybean growth and nitrogen fixation

    • R. Vieira

    Original Paper Pages: 196 - 200

11. Anion exclusion in microbial and soil polysaccharides

    • Timothy D. Hart
    • James M. Lynch
    • Anthony H. Chamberlain

    Original Paper Pages: 201 - 209

12. Growth, nitrogen fixation and occurrence of epiphytic algae at different pH in the cultures of two species of Azolla

    • S. Dawar
    • P. Singh

    Original Paper Pages: 210 - 214

13. The incidence of potentially pathogenic bacteria in liquor from selected wormfarms

    • Lindsay W. Smith

    Short Communication Pages: 215 - 217

14. Tillage and residue management effects on arylamidase activity in soils

    • V. Acosta-Martínez
    • M. Tabatabai

    Erratum Pages: 218 - 218