Items where Year is 1921

Number of items: 25.
Article
  • The preparation and fractionation of humic acid - The formation of humus. (1921) Beckley, V. A. picture_as_pdf
  • Studies in crop variation. 1. An examination of the yield of dressed grain from Broadbalk. (1921) Aylmer Fisher, Ronald
  • The development of the flower and grain of barley. (1921) Brenchley, Winifred Elsie picture_as_pdf
  • Root development in barley and wheat under different conditions of growth. (1921) Brenchley, Winifred Elsie, Jackson, V. G.
  • On a form of Botrytis Cinerea with colourless Scherotia. (1921) Brierley, W. B., Russell, Sir Edward picture_as_pdf
  • Biological studies of Aphis Rumicis Linn. (1921) Davidson, J.
  • Biological studies of Aphis Rumicis Linn. 1746 Part 1. (1921) Davidson, J.
  • Biological studies of Aphis Rumicis Linn. 1746 Part II. (1921) Davidson, J.
  • Biological studies of Aphis rumicis, L A Appearance of winged forms. B. Appearance of sexual forms. (1921) Davidson, J.
  • Studies on soil reaction. I. A resume. (1921) Fisher, E. A.
  • Studies on soil reaction. II. The colorimetric determination of the hydrogen ion concentration in soils and aqueous soil extracts. (1921) Fisher, E. A.
  • The evaporation of water from soil. II.: Influence of soil type and manurial treatment. (1921) Keen, Bernard Augustus picture_as_pdf
  • The relation between the clay content of certain physical properties of a soil. (1921) Keen, Bernard Augustus, Rackowski, H.
  • The factors determining soil temperature. (1921) Keen, Bernard Augustus, Russell, E. J. picture_as_pdf
  • The larval and pupal stages of the Bibionidae. (1921) Morris, H. M.
  • Agricultural chemistry and vegetable physiology. (1921) Russell, E. J.
  • Modern applications of chemistry to crop production. (1921) Russell, E. J.
  • Obituary Notice Percival Spencer Umfreville Pickering 6 March 1858 – 5 December 1920. (1921) Russell, E. J.
  • The economical use of artificial manures on the farm. (1921) Russell, E. J.
  • The improvement of peaty soils Part I True peats. (1921) Russell, E. J.
  • Science and modern farming. (1921) Russell, Sir Edward
  • On the Life History of Wireworms of the Genus Agriotes, Esch., with Some notes on that of Athous Haemorrhoidalis, F. Part II. (1921) Rymer Roberts, A. W.
  • Dephenolisation in soil I. (1921) Sen-Gupta, N. N. picture_as_pdf
  • The killing of botrytis spores by phenol. (1921) Smith, J. H.
  • Report on Froghopper Blight of Sugar-cane in Trinidad. (1921) Williams, Carrington Bonsor