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Root Penetration of Smeared Soil Surfaces

Published online by Cambridge University Press:  03 October 2008

R. E. Prebble
R. E. Prebble
Affiliation:
Physics Department, Rothamsted Experimental Station, Harpenden, Herts
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Summary

Winter wheat seeds were grown on compressed soil (a) with and without smearing, (b) with surface horizontal or at 45°, and (c) with and without a sand cover. Germination was not affected. At a soil suction of 0·1 bar, root penetration of the horizontal surface was decreased by smearing and by absence of an overburden; on a surface of 45° smearing had very little effect. As a general summary of the limited information, root penetration is decreased by 50 per cent for a ten-fold increase in suction above 0·1 bar; the effect of smearing is equivalent to a five-fold increase; and the effect of slope is equivalent to a four-fold decrease.

Type
Research Article
Information
Experimental Agriculture , Volume 6 , Issue 4 , October 1970 , pp. 303 - 308
Copyright
Copyright © Cambridge University Press 1970

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References

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