1. Investigations on the nitrogen nutrition of plants

   • G. W. Harmsen
   • D. J. Lindenbergh

   OriginalPaper Pages: 1 - 29

2. The biological detoxication of 2: 4-dichlorophenoxyacetic acid in soil

   • L. J. Audus

   OriginalPaper Pages: 31 - 36

3. Exploratory pot experiments on sensitiveness of different crops to sodium: A. Spinach

   • J. J. Lehr

   OriginalPaper Pages: 37 - 48

4. Studies with sweet corn

   • Gordon Haskell

   OriginalPaper Pages: 49 - 57

5. Mineral nutrition in relation to the biochemistry and physiology of potatoes

   • E. G. Mulder

   OriginalPaper Pages: 59 - 121

6. A simple apparatus for measuring the oxygen uptake of soils

   • H. Lees

   OriginalPaper Pages: 123 - 128