1. Biological nitrogen fixation in faba bean (Vicia faba L.) in the Ethiopian highlands as affected by P fertilization and inoculation

   • G. Amanuel
   • R. F. Kühne
   • P. L. G. Vlek

   ORIGINAL PAPER Pages: 353 - 359

2. Tillage practice influences on the physical protection, bioavailability and composition of particulate organic matter

   • M. M. Wander
   • M. G. Bidart

   ORIGINAL PAPER Pages: 360 - 367

3. Metabolic and physiological characteristics of salt-tolerant strains of Bradyrhizobium spp.

   • Faviana Barboza
   • Néstor S Correa
   • Susana B. Rosas

   ORIGINAL PAPER Pages: 368 - 373

4. Soil aggregate stabilization by a saprophytic lignin-decomposing basidiomycete fungus I. Microbiological aspects

   • T.-C. Caesar-TonThat
   • V. L. Cochran

   ORIGINAL PAPER Pages: 374 - 380

5. Chemical and biochemical properties as potential indicators of disturbances

   • R. M. Palma
   • N. M. Arrigo
   • M. E. Conti

   ORIGINAL PAPER Pages: 381 - 384

6. Denitrification enzyme activity is limited by soil aeration in a wastewater-irrigated forest soil

   • L. Barton
   • L. A. Schipper
   • C. D. A. McLay

   ORIGINAL PAPER Pages: 385 - 389

7. Structure and function of the soil microbial community in microhabitats of a heavy metal polluted soil

   • E. Kandeler
   • D. Tscherko
   • W. Amelung

   ORIGINAL PAPER Pages: 390 - 400

8. Interactions between a vesicular-arbuscular mycorrhizal fungus (Glomus intraradices) and Streptomyces coelicolor and their effects on sorghum plants grown in soil amended with chitin of brawn scales

   • G. M. Abdel-Fattah
   • A. H. Mohamedin

   ORIGINAL PAPER Pages: 401 - 409

9. Effect of solid waste compost on microbiological and physical properties of a burnt forest soil in field experiments

   • C. Guerrero
   • I. Gómez
   • M. T. Hernández

   ORIGINAL PAPER Pages: 410 - 414

10. Activity and stability of jack bean urease in the presence of peat humic acids obtained using different extractants

    • C. Marzadori
    • Ornella Francioso
    • Carlo Gessa

    ORIGINAL PAPER Pages: 415 - 420

11. Initial organic matter transformation of soil amended with composted sewage sludge

    • L. Hernández-Apaolaza
    • J. M. Gascó
    • F. Guerrero

    ORIGINAL PAPER Pages: 421 - 426

12. Soil layer-specific variability in net nitrification and denitrification in an acid coniferous forest

    • A. M. Laverman
    • H. R. Zoomer
    • H.A. Verhoef

    ORIGINAL PAPER Pages: 427 - 434

13. The effect of long-term fertilization with organic or inorganic fertilizers on mycorrhiza-mediated phosphorus uptake in subterranean clover

    • E. J. Joner

    ORIGINAL PAPER Pages: 435 - 440