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iii. Minimum Requirements . All open areas of a lot <br /> • <br /> which are not used and improved for required parking <br /> areas, drives or storage shall be landscaped with a <br /> combination of overstory trees, ornamental trees, <br /> coniferous trees, shrubs, flowers, and turf or ground <br /> cover materials . The number of trees on the lot, <br /> tract, or parcel, shall not be less than the perimeter <br /> of the described area as measured in feet divided by <br /> forty (40) . <br /> a. Overstory Trees. Fifty percent (50%) of the <br /> required trees shall be overstory trees . <br /> b. Ornamental Trees . Twenty-five percent (25%) <br /> of the required trees shall be ornamental trees . <br /> c. Coniferous Trees . Twenty-five percent (25%) <br /> of the required trees shall be coniferous trees . <br /> d. In order to accomplish an adequate buffer <br /> additional landscaping over and above the required <br /> amount may be requested by the City. <br /> e . Minimum Size and Root Condition of Required <br /> Trees . <br /> • 1 . ) overstory trees : two (2) inches in <br /> diameter as measured six (6) inches above <br /> the ground and trees must be balled and <br /> burlapped. <br /> 2 . ) ornamental trees : one and one-half (1 <br /> 1/2) inches in diameter as measured six (6) <br /> inches above the ground and trees must be <br /> balled and burlapped. <br /> 3 . ) coniferous trees : six (6) feet in <br /> height and trees must be balled and <br /> burlapped. <br /> f . Species . <br /> 1 . ) all required trees shall be comprised <br /> of species which are classified as <br /> overstory, ornamental, and coniferous trees <br /> by the American Nurseryman' s Association. <br /> 2 . ) not more than 50 percent (50%) of the <br /> 411 required number of overstory or ornamental <br /> trees shall be comprised of one species . <br /> 9.116 <br />