Vol. 24, No. 5 
Page 2 
most woodland owners in Illinois at least pay lip service to the idea of 
benefiting wildlife in any woodland management program. 
Tab ,e I Shows the minimum cutt Z 
different rotation lengt s clear-cut openings <500 feet across do not 
squirrel research has shown that c ear cut opening p . circle is about 
seriously disrupt resident squirre s Dene trate into a clear-cut much 
471 feet). Also, in summer squirrels ^^.^^^1 travel as much as 180 
b f:rt:m 5 th e e e uncut m f^st°^hu: we * recommend that clear-outs in these small 
“■SrErErSii'r 
to provide shelter for wildlife. 
, fnr dear-cutting or deferred from regeneration 
should h be r rnaged 9 for a seed n production using thinnings as recommended in MWRL 
24(2):2. 
Table 1. Minimum clear-cutting intervals (in years) for different rotation 
lengths, cutting areas, and woodland areas. 
20-acre woodland 
and rotation of 
(years) 
40-acre woodland 
and rotation of 
(years) 
60-acre woodland 
and rotation of 
(years) 
Minimum cutting 
area (acres) 
Cutting interval (years) 
2 
3 
4 
5 
6 
3 
12 
15 
8 
12 
16 
20 
10 
15 
20 
25 
3 
4 
6 
7 
4 
6 
8 
10 
5 
7 
10 
12 
2 
3 
4 
5 
2 
4 
5 
6 
3 
5 
6 
8 
From: Roach, B., and S. Gingrich. < 968 . Even-aged silviculture for upland 
central hardwoods. USDA Agnc. Handbook 355. 39pp. 
Responses of Prairie Chickens to Habitat Manipulation 
- W-66-R 
R. L. V/estemeier, 
J.E. Buhnerkempe 
Disturbances by the visiting public, 
pheasants, and prolonged bad weather have, 
mating by prairie chickens and resulted in 
persistant harassment by harriers and 
in some years, delayed or prevented 
substandard nesting. The implication 
