Department Bulletin 1430 
PLATE XII 
Fig. 1. — Bayfield County, Wis. Hills of coarse sand and gravel stretch to the horizon. Once 
heavily forested, now denuded and periodically fire swept. On account of the porosity of 
these soils there is comparatively little erosion. The sandy soils supplemented by lake 
storage result in low flood stages in the streams and high summer run-off. Typical of the 
Great Lakes region 
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Fig. 2. — Undulating forest land with sandy soil, recently lumbered and just burned over, 
Marquette County, Mich. Unless protected against fire this land will soon be similar to 
that in Figure 1. There is, however, even when the surface is broken, little erosion on such 
sites, because of the porosity of the soils 
FOREST INFLUENCES LOW 
