By Rebecca Burt
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Extra info for SOIL SURVEY LABORATORY METHODS MANUAL
Note thickness of segregated ice lenses and make a visual estimate of relative volume of segregated ice. Place representative pieces into a water-tight container so that the sample can be weighed, dried, and weighed again to calculate the amount of water and volume of ice. Excavate to a depth of 30 to 50 cm below the frost table, if practical. Clean off the pit face and be ready to photograph immediately. Sample each horizon or zone for mixed sample, bulk density, and thin section as is practical.
Soil patterns on landscapes follow catenary relationships. It is important to characterize both individual pedon properties and the soil relationships both above and below on the landscape. , multiple samples across the same hillslope). This appears intensive, but serves multiple purposes. A sample pedon or set of pedons provides vital characterization data and also can quantify the catenary pattern and processes. This is an efficient use of both sampling time and effort, as well as, laboratory resources.
Note the sample dimensions in the sampling notes. Collect samples from below the water table with a Macaulay peat sampler. If the samples appear undisturbed, mark 10-cm segments, slice with a knife, and place a single 11 segment in a plastic bag. Tie the top in a knot and place in a second plastic bag and tie the top of that bag in a knot. Put the double bagged sample in a clod box and label the appropriate cell on the inside of the lid to identify the soil survey number and horizon (zone) for the sample.