Parking, loading and stacking areas and driveways located adjacent to residential districts shall be landscaped by screening and/or buffering. Such screening and/or buffering shall be so designed that a person standing on the adjacent residential parcel on the minimum setback line, five feet above the average finished grade, would not be able to perceive by eye any uses, activities or automobile lights originating from said parking, loading or staking areas or driveway. This standard may be met by using various techniques, such as fencing, plant materials, earthen berms or combinations thereof. Such techniques can be applied within the required side and rear yards.