Areas void of significant vegetation shall receive landscape architectural treatment including planting, berming, fences or walls as appropriate. Berms, fences or walls shall be provided at a height of four feet to eight feet, or as necessary to provide a visual screen, with the approval of the Planning Board or Zoning Board of Adjustment. The general design, form and materials of fences, walls and berms should relate to the overall design and the materials utilized for other structures on the site and be aesthetically pleasing from all sides. Planting should be provided in conjunction with berming, fencing or walls or may be provided solely to provide a complete visual screen and visually interesting and pleasing area. The following quantities and minimum size guidelines are provided. If berms, fencing or walls are provided, a decreased quantity of planting may be provided at the discretion of the Planning Board or Zoning Board of Adjustment. For every 100 linear feet of buffer area, measured at the longest line, the following must be provided: