1. Influence of humic acids on laurel growth, associated rhizospheric microorganisms, and mycorrhizal fungi

   • G. Vallini
   • A. Pera
   • M. Giovannetti

   OriginalPaper Pages: 1 - 4

2. Ammonia volatilization from poultry manure-amended soil

   • K. L. Schilke-Gartley
   • J. T. Sims

   OriginalPaper Pages: 5 - 10

3. Effects of fractions of coal-derived humic substances on seed germination and growth of seedlings (Lactuga sativa and Lycopersicum esculentum)

   • A. Piccolo
   • G. Celano
   • G. Pietramellara

   OriginalPaper Pages: 11 - 15

4. Effects of inoculation with N₂-fixing cyanobacteria on the nitrogenase activity in soil and rhizosphere of wetland rice (Oryza sativa L.)

   • T. K. Ghosh
   • K. C. Saha

   OriginalPaper Pages: 16 - 20

5. Effect of cell surface characteristics on the adhesion of bacteria to soil particles

   • F. Huysman
   • W. Verstraete

   OriginalPaper Pages: 21 - 26

6. Impacts of agricultural practices on aquatic oligochaete populations in ricefields

   • Ian C. Simpson
   • Pierre A. Roger
   • Ian F. Grant

   OriginalPaper Pages: 27 - 33

7. Density and composition of aquatic oligochaete populations in different farmers' ricefields

   • Ian C. Simpson
   • Pierre A. Roger
   • Ian F. Grant

   OriginalPaper Pages: 34 - 40

8. Soil respiration on reclaimed coal-mine spoil

   • Andrew Gildon
   • David L. Rimmer

   OriginalPaper Pages: 41 - 44

9. Dynamics of nitrogen after deeper tillage in arable loess soils of West Germany

   • R. Nieder
   • U. Scheithauer
   • J. Richter

   OriginalPaper Pages: 45 - 51

10. Suitability of dehydrogenase activity assay as an index of soil biological activity

    • Lothar Beyer
    • Christine Wachendorf
    • Roland Knabe

    OriginalPaper Pages: 52 - 56

11. Nitrogen-supplying capacity of leaves of Dactyladenia barteri (Hook ex olw) and Leucaena leucocephala (Lam.) de Wit in two soils of different acidity from southern nigeria

    • K. Mulongoy
    • M. O. Gasser

    OriginalPaper Pages: 57 - 62

12. Fertilizer and temperature effects on urea hydrolysis in undisturbed soil

    • J. G. Xu
    • D. A. Heeraman
    • Y. Wang

    BriefCommunication Pages: 63 - 65

13. Hyphal transport by a vesicular-arbuscular mycorrhizal fungus of N applied to the soil as ammonium or nitrate

    • A. Johansen
    • I. Jakobsen
    • E. S. Jensen

    OriginalPaper Pages: 66 - 70

14. Effect of wax-coated calcium carbide and nitrapyrin on nitrogen loss and methane emission from dry-seeded flooded rice

    • D. G. Keerthisinghe
    • J. R. Freney
    • A. R. Mosier

    OriginalPaper Pages: 71 - 75

15. Mycorrhizal status of plant species colonizing a magnesite mine spoil in India

    • N. Raman
    • N. Nagarajan
    • K. Sambandan

    BriefCommunication Pages: 76 - 78