1. Nitrogen transformations in the former subaqueous soils of polders recently reclaimed from lake IJssel

   • D. A. van Schreven

   OriginalPaper Pages: 277 - 297

2. Biosynthesis of amino acids according to soil fertility

   • William A. Albrecht
   • John de Jonge

   OriginalPaper Pages: 298 - 308

3. Pot experiments on urea as a fertilizer

   • R. C. Stephen
   • J. S. Waid

   OriginalPaper Pages: 309 - 316

4. Soil mineralogy in relation to the spread of fusarium wilt of banana in central America

   • G. Stotzky
   • R. Torrence Martin

   OriginalPaper Pages: 317 - 337

5. Some steps in the degradation of naphthalene acetic acid

   • Michael H. Proctor

   OriginalPaper Pages: 338 - 345

6. Versuche Über Die Wirkung Von Toluol Auf Die Mikroflora Von Böden

   • Th. von Beck
   • H. Poschenrieder

   OriginalPaper Pages: 346 - 357

7. Studies of silica in the oat plant

   • L. H. P. Jones
   • A. A. Milne
   • S. M. Wadham

   OriginalPaper Pages: 358 - 371

8. The interaction of manganese and calcium on nodulation and growth in varieties oftrifolium repens

   • P. B. Vose
   • D. Gareth Jones

   OriginalPaper Pages: 372 - 385

9. Nitrogen requirements and the biological cycling of nitrogen in douglas-fir stands in relationship to the effects of nitrogen fertilization

   • Paul E. Heilman
   • S. P. Gessel

   OriginalPaper Pages: 386 - 402