1915

  1. Discussion on production and refining of sugar within the Empire
  2. Soil protozoa and soil bacteria
  3. Comparative field trials with, dried and degreased sewage sludges at Rothamsted
  4. Recent investigations on the production of plant food in the soil
  5. The Effect of removing the Soluble Humus from a Soil on its Productiveness
  6. Studies on the lime requirements of certain soils
  7. CP26Rendement, classement, caracteres et traitement des pommes a cidre pour la dessiccation
  8. Notes on some methods for the examination of soil protozoa
  9. Recolonisation of cultivated land allowed to revert to natural conditions
  10. Weeds on arable land and their suppression
  11. The atmosphere of the soil: its composition and the causes of variation
  12. Frequency distribution of the values of the correlation coefficient in samples from an indefinitely large population