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(ii) The compliment of trees fulfilling the landscaping requirements shall be not less <br />than 25 percent deciduous and lot less than 25 percent coniferous. No more than 25 <br />percent of the required plantings shall consist of ornamental trees. <br />(iii) For every 35 feet of public road frontage, one overstory tree shall be planted on <br />the private property adjacent to the public road right -of -way. <br />b. Topsoil. All exposed ground areas of a site not occupied by building, parking or <br />storage, excluding natural areas that are left undisturbed, shall be covered with four <br />inches of topsoil, as defined in section 117 -1. <br />c. Sodding and ground cover. All areas not otherwise improved in accordance with <br />approved site plans shall be finished with sod up to the edge of improved streets. Any <br />alternative to the sod requirement shall require city council approval. <br />d. Irrigation. <br />1. All landscaping areas required under this section shall include underground <br />irrigation systems. <br />2. Exceptions include natural areas that are left undisturbed. <br />e. Parking lot landscaping. All parking lots are required to provide internal overstory <br />tree plantings in an effort to shade parking surfaces and provide visual relief. Plantings are <br />required at the following minimum schedule. The planting schedule is established to provide <br />an acceptable number of plantings that may be planted in regular symmetrical patterns or <br />irregular clusters or groupings. <br />1. 1 tree per every ten parking spaces. <br />2. Every overstory tree planting shall be provided with a planting area of 162 square <br />3. Acceptable ground cover materials include sod, mulch, and other natural ground <br />cover. Landscaping rock and plastic underlayment is not allowed. <br />4. All parking lot planting areas shall include underground irrigation systems. <br />fe. Bufferyards. This section is intended to be minimum requirements to achieve <br />screening between differing uses with varied intensities and impacts that are not <br />always complementary when adjacent to one another. When a bufferyard is required <br />under this section, the yard space and planting requirements are not to be reduced for <br />other purposes such as future parking and driveways, building expansions, or other <br />activities that are not in keeping with the purposes of buffering and screening. <br />1. Bufferyards are intended to provide additional screening of businesses that are <br />16 <br />