1. The use of nitrogen-15 natural abundance and nitrogen yield of non-nodulating isolines to estimate nitrogen fixation by soybeans (Glycine max L.) across three elevations

   • Thomas George
   • Paul W. Singleton
   • Chris van Kessel

   OriginalPaper Pages: 81 - 86

2. Nitrification and nitrifying potential of tropical and subtropical soils

   • W. -L. Chao
   • K. D. Gan
   • C. C. Chao

   OriginalPaper Pages: 87 - 90

3. Microfungi in coniferous forest soils treated with lime or wood ash

   • E. Bååth
   • K. Arnebrant

   OriginalPaper Pages: 91 - 95

4. Fitting plants to soil through mycorrhizal fungi: plant nutrition in host-endophyte combinations evaluated by the diagnosis and recommendation integrated system

   • D. Espinoza-Victoria
   • M. Quintero-Ramos
   • G. J. Bethlenfalvay

   OriginalPaper Pages: 96 - 102

5. Fitting plants to soil through mycorrhizal fungi: Mycorrhiza effects on plant growth and soil organic matter

   • M. Quintero-Ramos
   • D. Espinoza-Victoria
   • G. J. Bethlenfalvay

   OriginalPaper Pages: 103 - 106

6. Effect of an increasing carbon: nitrate-N ratio on the reliability of acetylene in blocking the N₂O-reductase activity of denitrifying bacteria in soil

   • T. Simarmata
   • G. Benckiser
   • J. C. G. Ottow

   OriginalPaper Pages: 107 - 112

7. Effects of pine roots on microorganisms, fauna, and nitrogen availability in two soil horizons of a coniferous forest spodosol

   • Robert W. Parmelee
   • Joan G. Ehrenfeld
   • Robert L. Tate III

   OriginalPaper Pages: 113 - 119

8. In situ net N transformations in pine, fir, and oak stands of different ages on acid sandy soil, 3 years after liming

   • W. De Boer
   • M. P. J. Hundscheid
   • H. J. Laanbroek

   OriginalPaper Pages: 120 - 126

9. Effect of earthworm humic substances on esterase and peroxidase activity during growth of leaf explants of Nicotiana plumbaginifolia

   • A. Muscolo
   • M. Felici
   • S. Nardi

   OriginalPaper Pages: 127 - 131

10. Factors affecting the availability of organic carbon for denitrification of nitrate in subsoils

    • G. W. McCarty
    • J. M. Bremner

    OriginalPaper Pages: 132 - 136

11. Influence of liquid cattle manure on reduction processes in soil

    • Søren O. Petersen

    OriginalPaper Pages: 137 - 143

12. Reductive dissolution of crystalline and amorphous Fe(III) oxides by microorganisms in submerged soil

    • P. A. Wahid
    • N. V. Kamalam

    OriginalPaper Pages: 144 - 148

13. The effect of dicyandiamide and neem cake on the nitrification of urea-derived ammonium under field conditions

    • P. A. Joseph
    • R. Prasad

    OriginalPaper Pages: 149 - 152

14. Amelioration of subsoil acidity in an Oxisol of the humid tropics

    • M. D. Cahn
    • D. R. Bouldin
    • M. S. Cravo

    OriginalPaper Pages: 153 - 159