1920

  1. The determination of ammonia in soil
  2. The mechanism of the decomposition of cyanamide in the soil
  3. Daily periodicity in the numbers of active soil flagellates: with a brief note on the relation of trophic amoebae and bacterial numbers
  4. A method for estimating the number of active protozoa in the soil
  5. Numbers of protozoa in certain Rothamsted soils
  6. The relations existing between the soil and its water content: A Résumé of the Subject
  7. Weedkiller usage in England and Wales - information form surveys of farm practice
  8. Weeds of farm land
  9. Field experiments on the chemotropic responses of insects
  10. The fertilizing value of sewage sludges
  11. On the relations between growth and the environmental conditions of temperature and bright sunshine