1. Evaluation of some phosphoroamides as soil urease inhibitors

   • H. S. Chai
   • J. M. Bremner

   OriginalPaper Pages: 189 - 194

2. Relationship of root necrosis potential of soil to asparagus (Asparagus officinalis) decline in Switzerland

   • G. Gordon-Lennox
   • D. Gindrat

   OriginalPaper Pages: 195 - 198

3. Phosphatase activity in the rhizosphere and its relation to the depletion of soil organic phosphorus

   • J. C. Tarafdar
   • A. Jungk

   OriginalPaper Pages: 199 - 204

4. Degradation and metabolism of a fungicide, 2,4,5,6-tetra-chloroisophthalonitrile (TPN) in soil

   • K. Sato
   • H. Tanaka

   OriginalPaper Pages: 205 - 209

5. Bioactivity in limed soil of a spruce forest

   • L. Zelles
   • I. Scheunert
   • K. Kreutzer

   OriginalPaper Pages: 211 - 216

6. The establishment of microorganisms in vesicular-arbuscular mycorrhizal and control treatments

   • R. N. Ames
   • K. L. Mihara
   • G. J. Bethlenfalvay

   OriginalPaper Pages: 217 - 223