Page 6 - doi_preservationbrief48
P. 6

Figure A. Cemeteries are cultural landscapes made up of a
                                                                     variety of features. Grave markers are but one component of
                                                                     cemeteries that also include walkways, drives, fences, coping,
                                                                     trees, shrubs, and other vegetation. Each component adds to
                                                                     the understanding of the cemetery landscape. Photo: Debbie
                                                                     Dietrich Smith.

                                                                     Improper use of a string-trimmer is also
                                                                     potentially destructive, especially when it comes
                                                                     into contact with soft materials such as marble,
                                                                     limestone, and wood.  Using the lightest trim
                                                                     line and angling the trimmer head towards the
                                                                     ground will help reduce damage if the trimmer
                                                                     hits unintended targets.  Consider hand trimming
                                                                     around the most signifi cant, fragile features.

                                                                     As a time-saving measure, herbicides are
                                                                     sometimes used around the base of features
            Vegetation Management                                 to remove unwanted grass and weeds.  In most
                                                                  cases, use of herbicides for this purpose is not
            Carefully monitoring and managing of trees and other   recommended, as salts within the herbicide can
            vegetation is an integral part of a cemetery preventive   wick into the stone (especially soft stones) and
            conservation program.  Mature trees and ornamental    cause spalling and deterioration. The removal of
            shrubs can add character, shade, and seasonal color to   vegetation also exposes soil around the base of the
            historic cemeteries (Fig. A). However, if not properly   grave marker, which, in a heavy rain, can cause soil
            maintained, they can damage grave markers, fencing,   splashing that may result in staining.
            and other historic features. Mature trees may fall during
            storms and drop large limbs that topple grave markers   If fertilizer is applied, choose a natural organic
            and mangle fencing.  Overgrown vegetation creates wet,   fertilizer to minimize salt content for the reasons
            shaded areas and fosters biological growth than can   stated above.  For any chemical application, be sure
            accelerate deterioration of stone, iron, and wood objects.  to rinse away residue from grave markers, etc., with
                                                                  water using a low pressure hose or spray bott le, to
            A treatment plan for cemetery vegetation should       minimize continued contact.
            address trees, shrubs, vines, and “volunteer”
            growth.  For the assessment and treatment of trees    Ongoing maintenance of cemetery vegetation is
            that pose hazards, consult an International Society of   essential to conserve grave markers and fencing.
            Arboriculture (ISA) certifi ed arborist. Prune trees and   Periodic inspections may warrant removing
            shrubs adjacent to grave markers to allow air circulation   trees; trimming tree limbs, shrubs, and vines; and
            and light penetration.  Certifi ed arborists and master   removing volunteer vegetation.  All trees should
            gardeners should carry out this work or direct others   be inspected at least every fi ve years. Annual
            in pruning trees and shrubs, as many may be historic   inspections are necessary to assess the condition of
            features integral to the cultural landscape and worthy of   shrubs and vines, and to identify volunteer growth
            preservation.                                         for removal. Mowing and trimming around the
                                                                  hundreds of stone, brick, iron, and wood features
            Regarding lawn care, historic cemeteries were not     found in many cemeteries is a weekly or bi-weekly
            designed for today’s large riding lawnmowers, yet this is   chore.  Lawn care is the most time-consuming,
            the mower of choice for many cemeteries, as mowing is   and, if not done carefully, potentially destructive
            one of the most time-consuming and costly maintenance   maintenance activity in historic cemeteries.
            tasks generally undertaken.   Mowing between tight
            spots with a large riding mower deck is destined to
            cause damage.  Best practices include using a smaller,
            push mower between particularly sensitive features, and
            outfi tt ing riding mower decks with protective bumpers.    Figure B. A pool
            Low-cost options include using fi re hose padding or a   ‘noodle’ can be
            foam swimming ‘noodle’ (Fig. B). Additional damage is   fi tt ed to the deck
            caused by riding over low stones or coping, especially   of a lawnmower
            when the blade height is set low.  If rolling over these   to prevent damage
            features is unavoidable, many riding mowers have a    to grave markers.
            hand-control adjustment to temporarily raise and lower   Photo: Debbie
                                                                  Dietrich Smith.
            the blade height.

     6
   1   2   3   4   5   6   7   8   9   10   11