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The specific conductivities of soil extracts

Published online by Cambridge University Press:  27 March 2009

C. H. Wright
C. H. Wright
Affiliation:
(Agricultural Department, Nigeria.)
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Extract

1. Considerable differences were found in the specific conductivities of different soils at any one time of the year, and considerable differences in any one soil at different times of the year, the specific conductivities being highest in March and lowest in June and July. Hence it is only possible to compare different soils when samples of these soils are taken at the same time of the year.

2. A relation has been found between the specific conductivities of the soil extracts and the mean weights of lint per plant per row in the case of 2 strains of Ishan cotton. Other data are presented showing that the specific conductivity of a 1 to 5 soil extract is an index of the fertility of the soil.

3. It has been found that the specific conductivity of a soil decreases under continuous cultivation. There is evidence that the rate of solution also decreases under the same condition.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 18 , Issue 2 , April 1928 , pp. 186 - 193
Copyright
Copyright © Cambridge University Press 1928

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References

REFERENCES

(1)Atkins, W. R. G. (1924). Journ. Agric. Sci. 14, 198.CrossRefGoogle Scholar
(2)Mason, T. G. and Wright, C. H. (1925). Fourth Annual Bull. Agric. Dept. Nigeria, 3.Google Scholar
(3)Millar, C. E. (1923). Soil Sci. 16, 433.CrossRefGoogle Scholar
(4)Stewart, G. R. (1918). Journ. Agric. Research, 12, 311.Google Scholar
(5)Stewart, G. R. and Martin, J. C. (1921). Journ. Agric. Research, 20, 663.Google Scholar