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Water loss at Wad Medani. Part I

Published online by Cambridge University Press:  27 March 2009

R. H. K. Peto  and
H. Greene
R. H. K. Peto
Affiliation:
(Wellcome Tropical Research Laboratories, Wad Medani, Sudan)
H. Greene
Affiliation:
(Wellcome Tropical Research Laboratories, Wad Medani, Sudan)
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Extract

The severe climatic conditions under which cotton is grown in the Gezira make it desirable to establish relations between meteorological data and irrigation practice. By means of a rapid and fairly accurate balance it is practicable to measure water loss when small boxes containing moist soil are exposed for short periods and under different conditions. The scope of this method has been ascertained by preliminary experiments as to (1) the dependence of water loss on moisture content of the soil, (2) the distribution of water loss through the day, (3) the comparison of water loss from sand and from. Gezira soil, and (4) the comparison of water loss from shaded and unshaded soil. The application of data so obtained to field problems is facilitated by the fact that in respect to distribution and amount losses from soil are related to loss shown by a Piché evaporimeter. Within the canalised area alternation of irrigated and fallow land is responsible for local variations in atmospheric conditions. A daily fluctuation in the moisture content of surface soil from fallow land is recorded and may be instrumental in favourably modifying its physical properties. The heat of wetting of Gezira soil has been measured.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 19 , Issue 4 , October 1929 , pp. 715 - 726
Copyright
Copyright © Cambridge University Press 1929

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References

REFERENCES

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