ILLINOIS REGISTER 3083
DEPARTMENT OF NATURAL RESOURCES
NOTICE OF PROPOSED AMENDMENTS
to effect a minimum pruning height of 6 feet. Not more than 100
well distributed desirable crop trees per acre shall be selected and
fine hardwood (white and red oak, black walnut, etc.) species will
be given prime consideration. In order to reduce the risk of decay,
prune no live limbs over 3 inches in diameter.
D) All pruning must be as close to the stem as possible without
disturbing the branch bark ridge and branch collar.
E) Corrective pruning to influence tree form may be required in the
Plan; but such pruning shall not be cost-shared unless undertaken
along with side branch pruning.
(Source: Repealed at 33 Ill. Reg. ______, effective ____________)
Section 1536.51 Timber Stand Improvement
The purpose of Timber Stand Improvement (TSI) is to increase tree growth and quality, improve
stand vigor and health, influence tree species composition, enhance diversity of native flora and
improve wildlife habitat. Examples of TSI practices include pre-commercial thinning, crop tree
management (CTM), weeding, cleaning, cull tree removal and vine treatment.
a) Cost share is authorized for TSI based upon a silvicultural prescription approved
by the IDNR Forester and developed upon stand level analyses that support the
goals and objectives stated in the Plan.
b) Improvement measures shall be carried out in a manner to improve or protect the
quality of the environment, especially wildlife habitat, as described in the Plan.
c) Cost-Share Rates/Specifications
1) Timber Stand Improvement − 75% of actual cost not to exceed $54 per
2) The IDNR Forester must give prior approval of the practice area, the
methods to be used based upon the density and condition of the trees, and
the economic feasibility of the practice.
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