A. Simple Spacing Thinning When thinning on a spacing basis, Contractor will select and leave uncut the largest live conifer trees of good form and vigor that will maintain the average spacing designated in the Unit Description Table. To maintain average spacing, Contractor may not need to cut as many trees immediately adjacent to gaps. However, clumps or patches should not be left unthinned to make up for gaps in the stand. If the Compliance Forester determines that narrower spacing is appropriate for portions of a Unit, 6' x 6' spacing will be used. Spacing is the average distance between trees that will result in the correct number of trees left per acre. The number of trees left per acre will be measured by DNR to determine compliance with the Per Acre Zone of Acceptance as described in Clause C-02. B. Diameter Limit Thinning When thinning on a diameter limit basis, Contractor shall cut trees smaller than the diameter limit, specified in the Unit Description, and will leave uncut the largest live conifer trees of good form and vigor that will maintain the spacing designated in the Unit Description.
