Awnc ain L be ——t ue is | — 1S ee a ee eae A AAW, ™ Le ie ee as * + 
are peaty; all of them all of then form “"hummocks",éspecially wher 
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grazed. Most of the swamps are now drained. The lakes Have marshy 
shores. This lake region is 
and flora, hence it, is not surprising that it should dif: 
types as an envirohment for’ 6xotic species. This is a dairy region, 
and is heavily grazed.except in the suburban areas,where idle real 
estate furnishes an: exceptional samount of cover. 
The New Drift Prairie. (type b)..ean not be distinguished fram the 
loess prairie (type c) except by its fewer and shallower river breaks 
and the lesser thickness of the loess blanket. Both 
soil,so valuable for agriculture that not only have the interspersed 
river breaks been largely cleared of woodland and the remainder clean- 
he HE Tie ss ea ae . s 7: o ae ed Ase! a LAN maa} SER GS ny 4.1 ee ? 
by pasturing,but even the artificially planted hedges on the prair- 
4 
ie itself have been uprooted to make more room for corn.This prairie, 
especially type b,originally contained many marshy areas all of which 
ell of which are now drained(see Map J.) the original prairie sod is 
all gone. Where the land has any slope at all, erosion is bad,consid- 
ering the high value of the land. We have here, in short, one of the 
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tii 
most highly artificialized agricultural landscay 
The: more one studies.it; thes stronger ‘grows the conviction that. this 
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strong tendency for agricultural intensification, to remove every ves- 
. Ne ee Se, . ey 3 +1 e Was bh «+ 
a competitive evil,in the sense that 
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tige of tree and grass cover, i 
ri > o a A IN pee ge © ot apeteny ans Sta aet Ba 7 Pe a Bin ant “tank hg a be 
The reasoning behind this statement will be brought forth later. 
The Old Drift Prairie. has. Ligh 
4s om Map AY are characterized by 
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