. Bulletin. Natural history; Natural history. September, 1943 Brown & Yeager: Survey of Fur Resource 445 •^^ Fig. 9.—Sand Prairie habitat type, typical of several small regions in northern Illinois. Relatively unproductive soil and a general scarcity of marshes and streams account for the low fur yield for most species in the Central Sand Prairie Region. loams and clays, suggests the name. Many of the larger and most of the smaller streams are intermittent. Rapid runoff, due to extensive clearing, a rolling topog- raphy and tight gumbo subsoils, is largely responsible for this condition. T
. Bulletin. Natural history; Natural history. September, 1943 Brown & Yeager: Survey of Fur Resource 445 •^^ Fig. 9.—Sand Prairie habitat type, typical of several small regions in northern Illinois. Relatively unproductive soil and a general scarcity of marshes and streams account for the low fur yield for most species in the Central Sand Prairie Region. loams and clays, suggests the name. Many of the larger and most of the smaller streams are intermittent. Rapid runoff, due to extensive clearing, a rolling topog- raphy and tight gumbo subsoils, is largely responsible for this condition. The larg- est river in the region, the Embarrass, was reduced to water holes during the fall of 1940. Much of the land is too poor for profitable farming, and a percentage un- usual in Illinois has reverted to unculti- vated fields and brushland, fig. 10. As. Fig. 10.—(}ray Prairie habitat type. Characterized by good upland cover but a poor water supply, this type is comparatively low in fur production. Extensive woodland and non-intensive agriculture here favor most fur animals, but only a few permanent streams offer satisfactory range to such species as raccoons, minks and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
