1. Controls on nitric oxide emissions from tropical pasture and rain forest soils

   • William F. J. Parsons
   • Michael Keller

   Orginal Paper Pages: 151 - 156

2. Termite mounds in relation to the surrounding soils in the forest and derived savanna zones of southeastern Nigeria

   • H. O. Maduakor
   • A. N. Okere
   • C. C. Onyeanuforo

   Orginal Paper Pages: 157 - 162

3. Dynamics of nodulation, nitrogen fixation, nitrogen use and biomass yield over time in pot-grown Leucaena leucocephala (Lam.) de Wit

   • B. D. Kadiata
   • K. Mulongoy
   • N. O. Isirimah

   Orginal Paper Pages: 163 - 168

4. Variability in soils and vegetation associated with harvester ant (Pogonomyrmex rugosus) nests on a Chihuahuan Desert watershed

   • Walter G. Whitford
   • Rudolfo DiMarco

   Orginal Paper Pages: 169 - 173

5. Structural studies on soil nitrogen by Curie-point pyrolysis — gas chromatography/mass spectrometry with nitrogen-selective detection

   • H.-R. Schulten
   • C. Sorge
   • M. Schnitzer

   Orginal Paper Pages: 174 - 184

6. Interaction of ¹⁵N-labelled ammonium nitrate, urea and ammonium sulphate with soil N during growth of wheat (Triticum aestivum L.) under field conditions

   • A. Hamid
   • M. Ahmad

   Orginal Paper Pages: 185 - 189

7. Effect of incorporation depth and soil climate on straw decomposition rate in a loamy Podzoluvisol

   • A Kanal

   Orginal Paper Pages: 190 - 196

8. Effects of filter type and extraction efficiency on nitrogen mineralization measurements using the aerobic leaching soil incubation method

   • Peter P. Motavalli
   • Serita D. Frey
   • Neal A. Scott

   Orginal Paper Pages: 197 - 204

9. Phosphorus requirements and nitrogen accumulation by N₂-fixing and non-N₂-fixing leguminous trees growing in low P soils

   • N. Sanginga
   • S. K. A. Danso
   • G. D. Bowen

   Orginal Paper Pages: 205 - 211

10. Erratum

    • A. J. Reinecke
    • J. M. Venter
    • S. A. Viljoen

    Erratum Pages: 212 - 212