1. Influence of management practices on soil organic matter, microbial biomass and cotton yield in Alabama's “Old Rotation”

   • I. A. Entry
   • C. C. Mitchell
   • C. B. Backman

   Original Paper Pages: 353 - 358

2. Effect of earthworms on molybdenum-depending activities

   • U. Tomati
   • E. Galli
   • L. Pasetti

   Original Paper Pages: 359 - 361

3. Soil surface disturbances in cold deserts: effects on nitrogenase activity in cyanobacterial-lichen soil crusts

   • J. Belnap

   Original Paper Pages: 362 - 367

4. Influence of spatial root distribution, organic nitrogen mineralization and fertilizer application on soil interlayer ammonium

   • C. Marzadori
   • L. Vittori Antisari
   • C. Gessa

   Original Paper Pages: 368 - 373

5. Soil mesofauna dynamics, wheat residue decomposition and nitrogen mineralization in buried litterbags

   • M. J. Vreeken-Buijs
   • L. Brussaard

   Original Paper Pages: 374 - 381

6. Influence of soil properties on the population and activity of geophagous earthworms after five years of bare fallow

   • K. Auerswald
   • S. Weigand
   • C. Philipp

   Original Paper Pages: 382 - 387

7. Impact of elevated CO₂ on mycorrhizal associations and implications for plant growth

   • A. Hodge

   Original Paper Pages: 388 - 398

8. Release and consumption of nitrogen by snail feces in Negev Desert soils

   • E. Zaady
   • M. Shachak
   • P. M. Groffman

   Original Paper Pages: 399 - 404

9. Nematodes and their relationship to forest dynamics: I. Species and trophic groups

   • I. Armendáriz
   • P. Arpin

   Original Paper Pages: 405 - 413

10. Nematodes and their relationship to forest dynamics: II. Abundance and morphometric variability of Monochida related to changes in humus forms

    • P. Arpin
    • I. Armendáriz

    Original Paper Pages: 414 - 419

11. Effect of an artificial soil mix from coal fly ash and sewage sludge on soil microbial activity

    • J. W. C. Wong
    • K. M. Lai

    Original Paper Pages: 420 - 424

12. Nitrogen fixation and CO₂ exchange in soybeans (Glycine max L.) inoculated with mixed cultures of different microorganisms

    • V. P. Shabayev
    • V. Yu. Smolin
    • V. A. Mudrik

    Original Paper Pages: 425 - 430

13. Biomass and nutrient cycling in bamboo (Bambusa bambos) plantations of tropical areas

    • P. Shanmughavel
    • K. Francis

    Original Paper Pages: 431 - 434

14. Azospirillum spp. participation in dry matter partitioning in grasses at the whole plant level

    • Y. Bashan
    • J. G. Dubrovsky

    Original Paper Pages: 435 - 440

15. Nodulation and estimation of symbiotic nitrogen fixation by herbaceous and shrub legumes in Guinea savanna in Nigeria

    • N. Sanginga
    • A. Okogun
    • L. E. Wirkom

    Original Paper Pages: 441 - 448

16. N₂ fixation and growth of legumes as affected by sulphur fertilization

    • H. W. Scherer
    • A. Lange

    Original Paper Pages: 449 - 453

17. Amelioration of water stress effects on wetland rice by urea-N, plant growth regulators, and foliar spray of a diazotrophic bacterium Klebsiella sp.

    • S. S. Razi
    • S. P. Sen

    Original Paper Pages: 454 - 458

18. Nitrogen acquisition by pea and barley and the effect of their crop residues on available nitrogen for subsequent crops

    • E. S. Jensen

    Original Paper Pages: 459 - 464