1920

  1. The composition of potatoes immune from wart disease
  2. The agricultural value of organic manures
  3. The washing out of nitrates by drainage water from uncropped and unmanured land
  4. The partial sterilisation of soils
  5. Farmyard manure - its making and its use
  6. Regional factors in agriculture Geographical teacher
  7. Report on the proposed electrolytic treatment of seeds (Wolfryn process) before sowing
  8. British crop production
  9. The influence of chemical constitution on the toxicity of organic compounds to wireworms
  10. On the changes through which the nodule organism (Ps. radicicola) passes under cultural conditions
  11. The determination of ammonia in soil
  12. The mechanism of the decomposition of cyanamide in the soil
  13. Daily periodicity in the numbers of active soil flagellates: with a brief note on the relation of trophic amoebae and bacterial numbers
  14. A method for estimating the number of active protozoa in the soil
  15. Numbers of protozoa in certain Rothamsted soils
  16. The relations existing between the soil and its water content: A Résumé of the Subject
  17. Weedkiller usage in England and Wales - information form surveys of farm practice
  18. Weeds of farm land
  19. Field experiments on the chemotropic responses of insects
  20. The fertilizing value of sewage sludges
  21. On the relations between growth and the environmental conditions of temperature and bright sunshine