The use of penetrometers for estimating mechanical impedance to root growth
Soil resistance to root elongation is between about 2 and 8 times greater than soil resistance to a metal probe, or penetrometer. Much of this difference might be accounted for if penetrometers experience greater frictional resistance than plant roots. To reduce the vertical component of soil fricti...
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University of Aberdeen
1988
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Online Access: | http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333726 |