New Zealand Journal of Agricultural Research abstracts
Assessment of wheel traffic effect on soil compaction using a
soil core sampler
Engin Özgöz
Tekin Öztekin
Hikmet Günal
Gaziosmanpasa University Agricultural
Faculty Taslıciftlik
60240, Tokat, Turkey
enginozgoz@gop.edu.tr
Abstract This study was
conducted to evaluate the relative physical properties of soil samples
collected with a manual sampling method and a tractor-mounted portable
soil core sampler under uncompacted and compacted soil conditions, and
to determine the compaction depth resulting from successive passes of a
tractor wheel. The compaction of soils was induced by one, three and
five successive passes of the tractor wheel. The physical properties of
soil samples obtained by both methods were similar at
10–15 cm soil depth. However, the methods produced
significantly different results (P
< 0.01) at 30–35 cm soil depth.
Traffic applications resulted in a significant effect on both soil bulk
density and hydraulic conductivity at both depths. The increasing
number of passes resulted in increasing penetration resistance values
at the depth of ploughing. In contrast, below the 25 cm depth,
passes did not affect soil compaction compared to that at shallow
depths. The results revealed that the portable sampler device could
safely be used to collect soil cores. However, in clay soils having a
high potential for compaction, the device needs to be supplemented by
extra weight.
Keywords compaction;
bulk density; hydraulic conductivity; penetration resistance; core
sampler
A05022; Received 3 June 2005; accepted 5 April 2006; Online
publication date 10 July 2006
New Zealand Journal of Agricultural Research, 2006, Vol. 49:
299–306
0028–8233/06/4903–0299 © The
Royal Society of New Zealand 2006
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