accuracy, and efficiency of four tools for measuring soil bulk density
Richard E. Miller,
John Hazard, and Steven Howes. 2001. RES.PAP.PNW-RP-532.
U.S. Department of
Agriculture, Forest Service, Pacific Northwest
Research Station. 16 pgs.
Monitoring soil compaction is time consuming. A desire for
speed and lower costs, however, must be balanced with the appropriate
precision and accuracy required of the monitoring task. We compared
three core samplers and a cone penetrometer for measuring soil
compaction after clearcut harvest on a stone-free and a stony soil.
Precision (i.e., consistency) of each tool at depths of 0-10, 10-20,
and 20-30 cm was determined from two adjacent samples at 21 or more
sampling points in each harvested location. Because one bulk density (D
sampler provided a continuous sample of each decimeter depth, it was
designated as the standard; thereby, the relative accuracy and bias of
the two shorter core samplers could be calculated. Both shorter
samplers overestimated D
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