All open areas not utilized for parking areas, driveways, streets or roads, recreational facilities, patios or terraces shall be provided with lawns or other suitable growing ground cover, trees and shrubs. Continuous evergreen screening shall be required along the tract boundary lines which separate the project from neighboring residential uses, such screening to be no less than six feet high when planted. In addition, the project shall include supplemental screening by a board-on-board solid fence up to six feet in height. The use of chain-link fencing is prohibited. Shade trees are recommended to be provided along walks, driveways, parking areas, streets and roads. Screening or buffers, consisting of berms, fencing and/or landscaping, may be required around recreation, parking, utility and refuse disposal areas and around other similar areas at the discretion of the Planning Board and its professionals. All landscaping shall be maintained in good condition and shall be replaced where necessary.