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Water uptake by soya-bean roots as affected by their depth and by soil water content

Published online by Cambridge University Press:  27 March 2009

S. T. Willatt  and
H. M. Taylor
S. T. Willatt
Affiliation:
Iowa State University and Agricultural Research Service, US DA, Ames, Iowa
H. M. Taylor
Affiliation:
Iowa State University and Agricultural Research Service, US DA, Ames, Iowa
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Summary

A field experiment was made to determine water uptake patterns of soya beans and water use and to compare relative effectiveness of roots at various depths in the profile.

Depth of water extraction by the root systems increased with rooting depth. Water uptake rates decreased with soil water content at all soil depths and the soil water content at which roots extracted almost no water increased with depth. The maximum rate of uptake of the deep roots was greater, per unit of length, than shallow roots.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 90 , Issue 1 , February 1978 , pp. 205 - 213
Copyright
Copyright © Cambridge University Press 1978

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