trafficking extending less than 1 m out from the
rut, and we stayed close enough to the rut to min-
imize the effects of natural spatial variability with-
in the soil. The out-of-rut measurements were
always made on the "out-facing" side of a rut, and
not in the "shadow" of the tank pass, to avoid bias
caused by dragging of the tank undercarriage
over the soil.
We measured in-situ Kfs, with a Guelph per-
meameter (Soilmoisture Equipment Corp.) to
determine water infiltration into and through
the soil, which would be useful for predicting
rainfall infiltration and runoff (Reynolds 1993).
We measured steady-state infiltration rates in
a. Soil corer.
b. Collection of soil cores.
a. Guelph permeameter.
b. Measurement well.
c. Details of an individual core.
Figure 9. Soil corer and cores.
Figure 8. Setup of the Guelph permeameter and details
of a measurement well.
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