1. Effect of addition of various carbon substrates on denitrification in a vertic Mollisol

   • C. Lescure
   • L. Menendez
   • A. Pidello

   OriginalPaper Pages: 125 - 129

2. Seasonal effects of liming, irrigation, and acid precipitation on microbial biomass N in a spruce (Picea abies L.) forest soil

   • M. von Lützow
   • L. Zelles
   • J. C. G. Ottow

   OriginalPaper Pages: 130 - 134

3. Carbon and nitrogen mineralization and ammonia volatilization from fresh, aerobically and anaerobically treated pig manure during incubation with soil

   • M. Pilar Bernal
   • Holger Kirchmann

   OriginalPaper Pages: 135 - 141

4. Field evaluation of N₂ fixation and N partitioning in climbing bean (Phaseolus vulgaris L.) using ¹⁵N

   • K. S. Kumarasinghe
   • S. K. A. Danso
   • F. Zapata

   OriginalPaper Pages: 142 - 146

5. Dual inoculation of pretransplant stage Oryza sativa L. plants with indigenous vesicular-arbuscular mycorrhizal fungi and fluorescent Pseudomonas spp.

   • Shivcharn S. Dhillion

   OriginalPaper Pages: 147 - 151

6. Urease activity in two cultivated and non-cultivated arid soils

   • L. B. Fenn
   • J. L. Tipton
   • G. Tatum

   OriginalPaper Pages: 152 - 154

7. The effect of vesicular-arbuscular mycorrhizae in decreasing Ca acquisition by alfalfa plants in calcareous soils

   • R. Azcón
   • J. M. Barea

   OriginalPaper Pages: 155 - 159

8. Decomposition of lignin in soil microcompartments: A methodical study with three different C-14-labelled lignin substrates

   • S. Scheu

   OriginalPaper Pages: 160 - 164

9. N₂-fixation by ammonium-excreting Azospirillum brasilense in auxine-induced root tumours of wheat (Triticum aestivum L.)

   • C. Christiansen-Weniger

   OriginalPaper Pages: 165 - 172

10. Effect of the insecticide methidathion on agricultural soil microflora

    • J. Gonzalez-Lopez
    • M. V. Martinez-Toledo
    • V. Salmeron

    OriginalPaper Pages: 173 - 175

11. Influence of soil properties on microbial C, N, and P in dry tropical ecosystems

    • S. C. Srivastava

    OriginalPaper Pages: 176 - 180

12. Simultaneous estimates of the diversity and the degradative capability of heavy-metal-affected soil bacterial communities

    • H. H. Reber

    OriginalPaper Pages: 181 - 186

13. Effects of long-term 2,4-D application on microbial populations and biochemical processes in cultivated soil

    • J. P. Narain Rai

    OriginalPaper Pages: 187 - 191

14. Ammonium uptake and excretion in Azolla-Anabaena symbiosis

    • William J. Zimmerman

    Short Communication Pages: 192 - 194