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Evaporation from Lucerne Under Advective Conditions in the Sudan I. Factors Affecting Water Losses and Their Measurement

Published online by Cambridge University Press:  03 April 2017

J. P. Hudson
J. P. Hudson*
Affiliation:
Department of Horticulture, University of Khartoum, Sudan*
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Summary

It is suggested that irrigation should ideally be based on two sets of measurements, i.e. of conditions in the leaf and of cumulative evaporation rates respectively, on the assumption that the question 'When to irrigate ? ’ can best be answered from a knowledge of leaf water potential and the daytime behaviour of stomata, and the question ‘How much water to apply?’ from a knowledge of the current soil water deficit. It is emphasized that there is no unique or fixed relation between leaf water potential and soil water deficit, and since neither can be deduced from the other it is advisable to measure both in critical experimental work on irrigation. Various methods of measuring leaf water potential and evaporation rates are discussed, and their value in experimental work assessed.

Type
Research Article
Information
Experimental Agriculture , Volume 1 , Issue 1 , January 1965 , pp. 23 - 32
Copyright
Copyright © Cambridge University Press 1965

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