Hostname: page-component-cb9f654ff-mx8w7 Total loading time: 0 Render date: 2025-08-31T01:48:26.906Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies on White Yam (Dioscorea rotundata) III. Foliar Analysis for Nitrogen Nutrition

Published online by Cambridge University Press:  03 October 2008

R. A. Sobulo
R. A. Sobulo
Affiliation:
Institute of Agricultural Research and Training, University of Ife, Ibadan, Nigeria
Get access Rights & Permissions [Opens in a new window]

Summary

The concentrations of total nitrogen and nitrate–nitrogen in yam leaves receiving various levels of nitrogen were determined fortnightly. Nitrate–nitrogen was superior to total nitrogen as an index of nitrogen nutrition. Correlation coefficients between nitrate–nitrogen at various sampling dates and rate of nitrogen application were highest between late June and early July in two seasons, indicating that this is the best time to take single samples for foliar analysis. A relation was demonstrated between nitrate–nitrogen at this period and tuber yield.

Information

Type
Research Article
Information
Experimental Agriculture , Volume 8 , Issue 3 , July 1972 , pp. 271 - 279
Copyright
Copyright © Cambridge University Press 1972

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.)

Article purchase

Temporarily unavailable

References

REFERENCES

Amon, B. O. E. (1962). Rep. 1st Meeting Soil Fertility and Fertilizers Use in West Africa. F.A.O.Google Scholar
Amon, B. O. E. & Adetunji, S. A. (1969). Fertilizer Work in Western Nigeria 1960–1969. Min. Agric. Natural Resources, Western State, Nigeria.Google Scholar
Baker, E. F. I. (1962–1964). A Rep. Min. Agric. Natural Resources, Western Region, Nigeria.Google Scholar
Bromfield, A. R. (1967). End of Tour Rep. Min. Agric. Natural Resources, Western State, Nigeria.Google Scholar
Burhan, H. O. & Babikir, I. A. (1968). Expl Agric. 4, 311.CrossRefGoogle Scholar
Chapman, H. D. (1964). World Crops 16, 36.Google Scholar
Ferguson, T. U. & Haynes, P. H. (1970). Proc. 2nd Int. Symp. trop. root crops Hawaii 1, 93.Google Scholar
Irving, H. (1956). Trop. Agric., Trin. 33, 67.Google Scholar
Mackenzie, A. J., Spencer, W. F., Stockinger, K. R. & Krantz, B. A. (1963). Agron. J. 55, 55.Google Scholar
Jackson, M. L. (1950). Soil Chemical Analysis. London: Constable.Google Scholar
Nye, P. H. & Greenland, D. J. (1960). Tech. Bull. 51. Comm. Agric. Bureaux, Bucks.Google Scholar
Smith, P. F. (1962). A. Rev. Pl. Physiol. 13, 81.CrossRefGoogle Scholar
Sobulo, R. A. (1972a). Expl Agric. 8, 99.CrossRefGoogle Scholar
Sobulo, R. A. (1972b). Expl Agric. 8, 107.CrossRefGoogle Scholar
Ulrich, A. (1952). A. Rev. Pl. Physiol. 3, 207.CrossRefGoogle Scholar
Vine, H. (1953). Emp. J. exp. Agric. 21, 65.Google Scholar