1. Soil and plant biochemistry
  2. Seasonal variation in pink boll-worm attack on cotton in Egypt in the years 1916-1924
  3. Further records of insect migration
  4. Voluntary or involuntary migration in butterflies
  5. Rothamsted Conference RC No 1 : The growing of lucerne
  6. Rothamsted Conference RC No 2 : The culture and manuring of fodder crops
  7. Field experiments - how they are made and what they are
  8. Western north America
  9. Cotton on the Nile
  10. Regional surveys and scientific societies
  11. Investigations in Agricultural Science at Rothamsted
  12. The effect of applying a nitrogenous fertiliser to wheat at different stages of growth
  13. Studies On Contact Insecticides Part IV A quantitative examination of the toxicity of certain plants and plant products to Aphis rumicus. L. (the bean aphis)
  14. The investigations of KK Gedroiz on base exchange and absorption A resume
  15. The nature of soil acidity
  16. Colloids and their importance in the soil
  17. On the microscopic examination of bees for Acari
  18. The Bee Research Institute at Rothamsted
  19. Bio-electric Potentials of Intact Green Plants I Measurements of the bio-electric potentials of coleoptiles of avena sativa L. Var. Barnwell
  20. The effect of flooding with sea-water on the fertility of the soil
  21. Note on a remarkable correlation between grain and straw, obtained at Rothamsted
  22. The biological control of insect pests and injurious plants in the Hawaiian Islands
  23. The use of the aeroplane for applying insecticides
  24. The effect of climatic conditions on the growth of barley
  25. A method of staining bacteria flagella
  26. On the presence of an Egg-burster in Aphididae
  27. A Quantitative Examination Of The Toxicity Of 3:5‐Dinitro‐O‐Cresol And Other Compounds To Insect Eggs, Under Laboratory And Field Conditions
  28. The manuring of potatoes
  29. The organism forming nodules on Crotalaria Juncea (L.)
  30. The effect of some soil conditions on nodule formation on Crotalaria Juncea (L.)
  31. Studies on the lucerne nodule organism (B. Radicicola) under laboratory conditions
  32. The Resemblance between Twins, a Statistical Examination of Lauterbach's Measurements Correction
  33. The history and development of the use of superphosphate
  34. Soil management
  35. Soil physics and its bearing on practice
  36. On the effect of sunshine on wheat yield at Rothamsted
  37. A method of isolating and handling individual spores and bacteria
  38. Collembola injuring leaves of mangold seedlings
  39. Further experiments on the use of sulphur in relation to wart disease of potatoes
  40. The life-cycle of the nodule organism, bacillus radicicola (Beij.), in soil and its relation to the infection of the host plant
  41. further experiments on the use of sulphur in relation to wart disease of potatoes
  42. On the Relation of Certain Soil Algae to some Soluble Carbon Compounds
  43. Influence of protozoa on the process of nitrogen fixation by Azotobacter Chroococcum
  44. The determination of the diastolic power of malt and barley
  45. The evaporation of water from soil III. A critical study of the Technique
  46. The changes induced in the anatomical structure of Vicia faba by the absence of boron from the nutrient solution
  47. Wart disease of potatoes: The development of Synchytrium Endobioticum (Schilb.) Perg, in “immune” varieties
  48. The viability of the winter sporangium of Synchytrium Endobioticum (Schilb.) Perc., the organism causing wart disease in potato
  49. Variability of Species
  50. On the capillary forces in an ideal soil; correction of formulae given by W. B. Haines
  51. Bayes' theorem and the fourfold table
  52. The arrangement of field experiments
  53. The official method for the mechanical analysis of soils
  54. The mechanical analysis of soils. A report on the present position and recommendations for a new official method