Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-25T21:32:24.451Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies on soil reaction: VI. The interaction of acid soils, calcium carbonate and water, in relation to the determination of “lime requirements.”

Published online by Cambridge University Press:  27 March 2009

Edward M. Crowther  and
Wallace S. Martin
Edward M. Crowther
Affiliation:
Soil Physics Department, Rothamsted Experimental Station
Wallace S. Martin
Affiliation:
Soil Physics Department, Rothamsted Experimental Station
Get access Rights & Permissions [Opens in a new window]

Extract

The variations in Hutchinson-MacLennan “lime requirement” with the amount of soil and calcium bicarbonate solution are shown to be connected with the buffer action of the soil. Indirect titration curves can be derived from the calcium bicarbonate results, and show a systematic divergence from the direct electrometric titration curves, owing to the variable calcium concentration of the final bicarbonate solutions. In the presence of calcium chloride both methods show lower pH values for a given base absorption and yield almost identical titration curves. The Hutchinson-MacLennan “lime requirement” is always less than the equivalent of the amount of calcium hydroxide necessary to give a neutral suspension in the electrometric titrations. The calcium bicarbonate solutions at equilibrium are always more acid than pH 6·2, but the “salt effect” tends to give results corresponding to a somewhat higher degree of neutralisation. “Lime requirements” should be obtained by interpolation to some arbitrary concentration, and an empirical relationship is given by which the interpolation may be made from a single determination. The Hutchinson-MacLennan method can give no indication of the intensity of soil acidity, but serves to estimate the amount of lime necessary to give a considerable reduction of acidity.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 15 , Issue 2 , April 1925 , pp. 237 - 255
Copyright
Copyright © Cambridge University Press 1925

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

page 238 note 1 H. B., Hutchinson and K., MacLennan, Journ. Agric. Sci. 7, 75–105, 1915.Google Scholar

page 238 note 2 E. A., Fisher, Journ. Agric. Sci. 11, 19–44, 1921.Google Scholar

page 238 note 3 T., Eden, Journ. of Ecology, 12, 267–286, 1924.Google Scholar

page 238 note 4 E. M., Crowther, IV, this Journal, pp. 222–231.Google Scholar

page 238 note 5 E. M., Crowther, III, this Journal., pp. 201–221.Google Scholar

page 241 note 1 See p. 247 of this paper.

page 242 note 1 W. M., Clark, Determination of Hydrogen Ions, p. 320, 2nd Edition. Baltimore, 1922.Google Scholar

page 244 note 1 E. M., Crowther, III, this Journal, p. 215.Google Scholar

page 252 note 1 For example, B., Tacke, Chem. Zeit. 22, 174, 1897Google Scholar or in Wiley's, Principles and Practice of Agricultural Analysis, 1, 373, 1906Google Scholar; H., Süchting, Z. angew. Chem. 21, 1, 1908Google Scholar; J. W., Ames and C. J., Schollenberger, Ohio B. 306, p. 346, 1916Google Scholar; C. J., Schollenberger, Soil Sci. 11, 261–276, 1922.Google Scholar

page 255 note 1 Crowther, E. M. and Martin, W. S.Journ. Chem. Soc. 125, 1937, 1925.Google Scholar