The variability of soil profiles causes difficulty in the preparation of a soils map for forestry purposes. The differences from profile to profile are apt to bewilder the beginner unless he understands the reasons for them. A very nice example of this class of soils problem was encountered about a year ago in the subdivision of the Dukes Experimental Forest of the Lake States Forest Experiment Station.
Scholz, Harold F.
"Mapping of Forest Soils,"
Ames Forester: Vol. 19
, Article 3.
Available at: https://lib.dr.iastate.edu/amesforester/vol19/iss1/3