Items where Year is 1920

Number of items: 25.
B
  • On the changes through which the nodule organism (Ps. radicicola) passes under cultural conditions. (1920) Bewley, W. F.
  • Weedkiller usage in England and Wales - information form surveys of farm practice. (1920) Boyd, David A.
  • On the relations between growth and the environmental conditions of temperature and bright sunshine. (1920) Brenchley, Winifred Elsie picture_as_pdf
  • Weeds of farm land. (1920) Brenchley, Winifred Elsie picture_as_pdf
  • The fertilizing value of sewage sludges. (1920) Brenchley, Winifred Elsie, Richards, E. H.
    • C
  • The mechanism of the decomposition of cyanamide in the soil. (1920) Cowie, G. A.
  • Numbers of protozoa in certain Rothamsted soils. (1920) Crump, L. M.
  • A method for estimating the number of active protozoa in the soil. (1920) Cutler, D. W.
  • Daily periodicity in the numbers of active soil flagellates: with a brief note on the relation of trophic amoebae and bacterial numbers. (1920) Cutler, D. W., Crump, L. M.
    • F
  • A mathematical Examination of the Methods of determining the Accuracy of Observation by the Mean Error, and by the Mean Square Error. (1920) Fisher, Ronald Aylmer
    • I
  • Field experiments on the chemotropic responses of insects. (1920) Imms, Augustus Daniel, Hussain, M. A.
  • II. On the structure and biology of archotermopsis, together with descriptions of new species of intestinal protozoa, and general observations on the isoptera. (1920) Imms, Augustus, Hickson, S. J.
    • K
  • The relations existing between the soil and its water content: A Résumé of the Subject. (1920) Keen, Bernard Augustus picture_as_pdf
    • M
  • The determination of ammonia in soil. (1920) Matthews, D. J. picture_as_pdf
  • Observations on the insect fauna of permanent pasture in Cheshire. (1920) Morris, H. M.
    • R
  • Farmyard manure - its making and its use. (1920) Russell, E. J.
  • Regional factors in agriculture Geographical teacher. (1920) Russell, E. J.
  • Report on the proposed electrolytic treatment of seeds (Wolfryn process) before sowing. (1920) Russell, E. J.
  • The agricultural value of organic manures. (1920) Russell, E. J.
  • The composition of potatoes immune from wart disease. (1920) Russell, E. J.
  • The partial sterilisation of soils. (1920) Russell, E. J.
  • British crop production. (1920) Russell, Sir Edward
  • The washing out of nitrates by drainage water from uncropped and unmanured land. (1920) Russell, Sir Edward, Richards, E. H., Miller, N. H. J. picture_as_pdf
    • T
  • The influence of chemical constitution on the toxicity of organic compounds to wireworms. (1920) Tattersfield, Frederick, Roberts, A. W. R. picture_as_pdf
    • W
  • Records of insect migration in Tropical America. (1920) Williams, Carrington Bonsor
    • This list was generated on Sat Apr 11 01:07:59 2026 BST.