140 Profile Depth measurement
The effective rooting depth is the maximum depth till where roots have been observed during the profile description.
The rock depth of the soil profile, is the depth where the continuous rock, if present, starts.
In case the profile depth is limited by an obstacle different from continuous rock, (e.g. cemented layer, iron pan, permanent water table...) this depth should be reported in column 189-191 and the kind of obstacle should be noted in the field other observation.
In case no rock or obstacle has been observed, the related fields should be left empty.