Single-ring infiltration tests are part of the Soil Carbon Challenge baseline method.
In order to have a better repeatable observation, we recommend using five, 6-inch diameter rings, and running them concurrently using one stopwatch: start #1 at 0, #2 at 1:00 (one minute), #3 at 2:00, and so on, and subtracting the start time from the finish time for each ring. Variability may be high, so 5 rings will give you a better picture than one. You may use our data entry app atlasbiowork to record your data.
Soil Carbon Coalition is a 501(c)3 nonprofit organization