TY  - JA
AU  - Whiteley,G.M.
AU  - Dexter,A.R.
AU  - Utomo,W.H.
TI  - A comparison of penetrometer pressures and the pressures exerted by roots
SN  - 1573-5036
U1  - 82-766204 
PY  - 1981///
N1  - 33 ref.; Summary (En); Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0032-079X
N2  - Previous work is reviewed in which the ratio of the pressures required for soil penetration by roots and penetrometers are compared. It appears that this ratio can vary from about 2 to 8 depending on conditions. However, there is very little experimental evidence and most of the work has been inferential. Direct measurements are reported for the stresses exerted by a 1 mm diameter penetrometer probe and by the roots of pea seedlings when penetrating Urrbrae fine sandy loam. Six soil conditions were used: (non-weathered remoulded soil cores + artificially weathered remoulded soil cores + undisturbed field clods) + (confined +
T2  - Plant and Soil
ER  -