Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-03T05:19:38.846Z Has data issue: false hasContentIssue false
  • English
  • Français

Population studies with wheat: II. Propinquity

Published online by Cambridge University Press:  27 March 2009

H. G. Hudson
H. G. Hudson
Affiliation:
School of Agriculture, Cambridge
Get access Rights & Permissions [Opens in a new window]

Extract

An investigation of the problem of propinquity has shown that the yield of any unit of 6 in. of drill row of wheat is significantly affected by the number of plants in adjacent units. The “competition correlation”, which measures the intensity of this effect, is greatest with medium plant densities, and low and often insignificant for units of high or low plant density.

Competition is primarily underground for water, soil nutriments and soil air; of these, competition for water is most important in determining yield.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 31 , Issue 1 , January 1941 , pp. 116 - 137
Copyright
Copyright © Cambridge University Press 1941

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

REFERENCES

Anonymous, (1926). J.R. agric. Soc. 87, 103.Google Scholar
Clements, F. E., Weaver, J. E. & Hanson, H. C. (1929). Plant Competition. Carnegie Institution, Washington.Google Scholar
Comrie, L. J., Hey, G. B. & Hudson, H. G. (1937). J.R. statist. Soc. Suppl. 4, 210.CrossRefGoogle Scholar
Davies, C. (1931). J.S.-E. agric. Coll. Wye, 28, 243.Google Scholar
Doughty, L. R. & Engledow, F. L. (1928). J. agric. Sci. 18, 317.CrossRefGoogle Scholar
Engledow, F. L. (1925). J. agric. Sci. 15, 125.CrossRefGoogle Scholar
Engledow, F. L. (1926). J. agric. Sci. 16, 166.CrossRefGoogle Scholar
Engledow, F. L. (1928). J. agric. Sci. 18, 1.CrossRefGoogle Scholar
Engledow, F. L. & Ramiah, K. (1930). J. agric. Sci. 20, 265.CrossRefGoogle Scholar
Fairfield-Smith, H. (1937). Bull. Coun. sci. industr. Res. Aust. 109.Google Scholar
Fisher, R. A. (1938). Statistical Methods for Research Workers. Edinburgh.Google Scholar
Garner, F. H. & Sanders, H. G. (1939). J. agric. Sci. 29, 59.Google Scholar
Harrington, J. B. & Pavlychenko, T. K. (1935). Sci. Agric. 16, 151.Google Scholar
Hellriegel, J. (1883). Beiträge zu den naturwissenschaftlichen Grundlagen des Ackerbaues….Google Scholar
Hudson, H. G. (1939). J. agric. Sci. 29, 76.CrossRefGoogle Scholar
Hudson, H. G. (1941). J. agric. Sci. 31, 138.CrossRefGoogle Scholar
Isserlis, L. (1927). Biometrika, 19, 87.CrossRefGoogle Scholar
Kiesselbach, T. A. (1923). J. Amer. Soc. Agron. 15, 199.CrossRefGoogle Scholar
Mayer, A. (1879). Landw. VersSta. 23, 249.Google Scholar
Rayns, P. (1930). J.R. agric. Soc. 91, 109.Google Scholar
Sachs, J. (1860). Landw. VersSta. 2, 1.Google Scholar
Snedecor, G. W. (1937). Statistical Methods. Ames.Google Scholar
Stewart, F. C. (1919). Bull. N.Y. St. agric. Exp. Sta. 459, 45.Google Scholar
Wollny, E. (1881). J. Landw. 29, 25, 217, 493.Google Scholar