1. Effect of wheat roots on denitrification at varying soil air-filled porosity and organic-carbon content

   • K. Prade
   • G. Trolldenier

   OriginalPaper Pages: 1 - 6

2. Differences in mycorrhizal infection and P uptake of sweet potato cultivars (Ipomoea batatas L.) during their early growth in three soils

   • K. Mulongoy
   • A. Callens
   • J. A. Okogun

   OriginalPaper Pages: 7 - 10

3. Short-term measurements of uptake of nitrogen fixed in the rhizospheres of sorghum (Sorghum bicolor) and millet (Pennisetum americanum)

   • K. E. Giller
   • S. P. Wani
   • P. J. Dart

   OriginalPaper Pages: 11 - 15

4. Nitrification activity in submerged soils and its relation to denitrification loss

   • J. C. Katyal
   • M. F. Carter
   • P. L. G. Vlek

   OriginalPaper Pages: 16 - 22

5. Reproduction of the African earthworm, Eudrilus eugeniae (Oligochaeta) — cocoons

   • A. J. Reinecke
   • S. A. Viljoen

   OriginalPaper Pages: 23 - 27

6. Influence of mycorrhiza vs. soluble phosphate on growth, nodulation, and N₂ fixation (¹⁵N) in alfalfa under different levels of water potential

   • R. Azcón
   • F. El-Atrach
   • J. M. Barea

   OriginalPaper Pages: 28 - 31

7. Quantification and potential availability of non-symbiotically fixed ¹⁵N in soil

   • F. Azam
   • R. L. Mulvaney
   • F. J. Stevenson

   OriginalPaper Pages: 32 - 38

8. Factors affecting surface casting behaviour in several species of earthworm

   • J. Scullion
   • G. A. Ramshaw

   OriginalPaper Pages: 39 - 45

9. Soil faunal vs. fertilization effects on plant nutrition: results of a biocide experiment

   • D. H. Wright
   • D. C. Coleman

   OriginalPaper Pages: 46 - 52

10. Bacteria and fungi on roots of different barley varieties (Hordeum vulgare L.)

    • E. Liljeroth
    • E. Bååth

    OriginalPaper Pages: 53 - 57

11. Water-facilitated dispersal of inoculant Bradyrhizobium japonicum in soils

    • G. A. Breitenbeck
    • H. Yang
    • E. P. Dunigan

    OriginalPaper Pages: 58 - 62

12. Survival and competitiveness of Bradyrhizobium sp. in the rhizosphere of pigeonpea (Cajanus cajan)

    • S. S. Dudeja
    • A. L. Khurana

    OriginalPaper Pages: 63 - 66

13. Effect of wheat (Triticum aestivum) roots on mineralization rates of soil organic matter

    • Z. Sallih
    • P. Bottner

    OriginalPaper Pages: 67 - 70

14. Root activity and carbon metabolism in soils

    • P. Bottner
    • Z. Sallih
    • G. Billes

    OriginalPaper Pages: 71 - 78

15. Carbon and nitrogen accretion and dynamics in volcanic ash deposits from different subarctic habitats

    • S. C. Hart

    OriginalPaper Pages: 79 - 87

16. Specimen preparation, stain type, and extraction and observation procedures as factors in the estimation of soil mycelial lengths and volumes by light microscopy

    • A. W. West

    OriginalPaper Pages: 88 - 94