Where a nonresidential or mixed-use development is contiguous to a residential use or zone, there shall be a landscaped buffer strip along the perimeter of the property where it is contiguous to such residential property or zone. Such buffer strip shall be at least 10 feet in depth measured from the residential property line and shall be used as a planting strip or developed as a planted berm, with plant material (trees, shrubs, and plants, including a combination of coniferous and deciduous varieties) a minimum of six feet in height at time of planting. In addition, the reviewing body may also require a solid, board-on-board fence in conjunction with the plantings of at least five feet in height.