1. Effects of nitrification inhibitors on denitrification of nitrate in soil

   • J. M. Bremner
   • J. C. Yeomans

   OriginalPaper Pages: 173 - 179

2. Soybean nodulation and nitrogen fixation on soil previously amended with sewage sludge

   • J. R. Heckman
   • J. S. Angle
   • R. L. Chaney

   OriginalPaper Pages: 181 - 185

3. Effect of nutrient compositions in peat hydrolysate on protein and biomass yields of Candida tropicalis

   • F. -H. Chang

   OriginalPaper Pages: 187 - 194

4. Effects of various nitrogen fertilizers on emission of nitrous oxide from soils

   • G. A. Breitenbeck
   • J. M. Bremner

   OriginalPaper Pages: 195 - 199

5. Effects of rate and depth of fertilizer application on emission of nitrous oxide from soil fertilized with anhydrous ammonia

   • G. A. Breitenbeck
   • J. M. Bremner

   OriginalPaper Pages: 201 - 204

6. Luciferase preparation, assay conditions and calculated extraction efficiency as factors in the estimation of soil ATP content

   • A. W. West
   • G. P. Sparlings
   • J. Reynolds

   OriginalPaper Pages: 205 - 211

7. Short- and long-term effects of heavy metals on urease activity in soils

   • P. Doelman
   • L. Haanstra

   OriginalPaper Pages: 213 - 218