1. Editorial

   • J. C. G. Ottow

   EditorialNotes Pages: 1 - 1

2. Site of nitrous oxide production in field soils

   • L. L. Goodroad
   • D. R. Keeney

   OriginalPaper Pages: 3 - 7

3. Differentiation of soil fauna in desert agriculture of the Mariut region

   • S. I. Ghabbour
   • J. P. C. Da Fonseca
   • S. H. Shakir

   OriginalPaper Pages: 9 - 14

4. Inoculation withGlomus mosseae improves N₂ fixation by field-grown soybeans

   • F. Ganryl
   • H. G. Diem
   • Y. R. Dommergues

   OriginalPaper Pages: 15 - 23

5. Fractionation of hydrolase-humus complexes by gel chromatography

   • P. Nannipieri
   • B. Ceccanti
   • M. Bonmati

   OriginalPaper Pages: 25 - 29

6. Effect of increasing oxygen concentration on total denitrification and nitrous oxide release from soil by different bacteria

   • M. N. I. Abou Seada
   • J. C. G. Ottow

   OriginalPaper Pages: 31 - 38

7. Influence of dieldrin on the reproduction of the earthwormEisenia fetida (Oligochaeta)

   • A. J. Reinecke
   • J. M. Venter

   OriginalPaper Pages: 39 - 44

8. Effects of synthetic and microbially produced chelates on the diffusion of iron and phosphorus to a simulated root in soil

   • R. K. Reid
   • C. P. P. Reid
   • P. J. Szaniszlo

   OriginalPaper Pages: 45 - 52

9. Potassium uptake of rye-grass (Lolium perenne) and red clover (Trifolium pratense) as related to root parameters

   • K. Mengel
   • D. Steffens

   OriginalPaper Pages: 53 - 58