1. Effects of conventional tillage on biochemical properties of soils

   • M. Curci
   • M. D. R. Pizzigallo
   • P. Ruggiero

   ORIGINAL PAPER Pages: 1 - 6

2. A new approach to enhance growth and nodulation of Acacia mangium through aeroponic culture

   • F. Martin-Laurent
   • S.-K. Lee
   • P. Durand

   ORIGINAL PAPER Pages: 7 - 12

3. Biodiversity of endophytic bacteria which colonize red clover nodules, roots, stems and foliage and their influence on host growth

   • A. V. Sturz
   • B. R. Christie
   • J. Nowak

   ORIGINAL PAPER Pages: 13 - 19

4. Influence of earthworms on soil properties and grass production in reclaimed cutover peat

   • K. E. Boyle
   • J. P. Curry
   • E. P. Farrell

   ORIGINAL PAPER Pages: 20 - 26

5. Influence of drying and ageing on the stabilization of earthworm (Lumbricidae) casts

   • R. P. Hindell
   • B. M. McKenzie
   • J. M. Tisdall

   ORIGINAL PAPER Pages: 27 - 35

6. Humic acid effects on 2-hydroxypyridine metabolism by starving Arthrobacter crystallopoietes cells

   • S. Hwang
   • R. L. Tate III.

   ORIGINAL PAPER Pages: 36 - 40

7. Recovery of nitrification and production of NO and N2O after exposure of soil to acetylene

   • A. Bollmann
   • R. Conrad

   ORIGINAL PAPER Pages: 41 - 46

8. Effects of inoculation with Glomus mosseae, Azorhizobium caulinodans and rock phosphate on the growth of and nitrogen and phosphorus accumulation in Sesbania rostrata

   • M. K. Rahman
   • J. W. Parsons

   ORIGINAL PAPER Pages: 47 - 52

9. Fate of 14C-ring-labeled 2,4-D, 2,4-dichlorophenol and 4-chlorophenol during straw composting

   • P. Benoit
   • E. Barriuso

   ORIGINAL PAPER Pages: 53 - 59

10. Rapid response of soil protozoa to elevated CO2

    • A. M. Treonis
    • J. F. Lussenhop

    ORIGINAL PAPER Pages: 60 - 62

11. Carbon availability and microbial biomass in soil under an irrigated wheat-maize cropping system receiving different fertilizer treatments

    • T. Mahmood
    • F. Azam
    • K. A. Malik

    ORIGINAL PAPER Pages: 63 - 68

12. Balance and turnover of nutrients in a bamboo plantation (Bambusa bambos) of different ages

    • P. Shanmughavel
    • K. Francis

    ORIGINAL PAPER Pages: 69 - 74

13. Relationship of soil carbon light fraction, microbial activity, humic acid production and nitrogen fertilization in the decaying process of corn stubble

    • M. E. Conti
    • N. M. Arrigo
    • H. J. Marelli

    ORIGINAL PAPER Pages: 75 - 78

14. MES [2-(N-morpholine)-ethane sulphonic acid] buffer promotes the growth of external hyphae of the arbuscular mycorrhizal fungus Glomus intraradices in an alkaline sand

    • A. Vilarin˜o
    • B. Frey
    • H. Shüepp

    ORIGINAL PAPER Pages: 79 - 81

15. Kinetics of nitric oxide consumption in tropical soils under oxic and anoxic conditions

    • M. Koschorreck
    • R. Conrad

    ORIGINAL PAPER Pages: 82 - 88

16. Sequential extractions and 31P-NMR spectroscopy of phosphorus forms in animal manures, whole soils and particle-size separates from a densely populated livestock area in northwest Germany

    • P. Leinweber
    • L. Haumaier
    • W. Zech

    ORIGINAL PAPER Pages: 89 - 94

17. Effect of cultivation on physical speciation of humic substances and plant nutrients in aggregate fractions of crusting soil from Zimbabwe

    • M. T. Pardo
    • S. Giampaolo
    • G. Almendros

    ORIGINAL PAPER Pages: 95 - 102