1. Studies on fungi in the root region

   • G. S. Taylor
   • Dennis Parkinson

   OriginalPaper Pages: 1 - 20

2. Root exudates of plants

   • V. Vančura
   • A. Hovadík

   OriginalPaper Pages: 21 - 32

3. Mobilization of non-exchangeable potassium and sodium in a calcareous soil during plant growth

   • Robert L. Fox
   • Burhan Kacar

   OriginalPaper Pages: 33 - 44

4. Earthworm activity and plant growth in artificial cultures

   • J. A. Van Rhee

   OriginalPaper Pages: 45 - 48

5. Reactions between amino acid compounds and phenols during oxidation

   • K. Haider
   • L. R. Frederick
   • W. Flaig

   OriginalPaper Pages: 49 - 64

6. Influence of high and low exchangeable Mg and Ca percentages at different degrees of base saturation on growth and chemical composition of citrus plants

   • J. P. Martin
   • A. L. Page

   OriginalPaper Pages: 65 - 80

7. Factors controlling the efficiency of rock phosphates for potatoes and rye on humic sandy soils

   • F. Van Der Paauw

   OriginalPaper Pages: 81 - 98

8. Die Aufnahme von Kohlendioxid durch die Pflanzenwurzel

   • H. Kick
   • D. Sauerbeck
   • F. Führ

   OriginalPaper Pages: 99 - 111

9. Studies on the major-element deficiencies of the pigeon pea (Cajanus cajan) in sand culture

   • R. Nichols

   OriginalPaper Pages: 112 - 126

10. The effect of sodium salts on the nitrogen, phosphorus, potassium, sodium and amino acid content of rice shoots

    • G. Pálfi

    OriginalPaper Pages: 127 - 135

11. Forces involved in retention and movement of non-metabolic strontium inPhaseolus vulgaris

    • Fred H. Emmert

    OriginalPaper Pages: 136 - 142