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Maintenance of Park and Recreation Facilities
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allow American Elm amount applied bacteria bark base blade bloom branches California cause Chapter Check cleaning solution color commercial fertilizer condition conifers copper sulfate corms custodian damage deciduous detergent detergent powder diamond disease drain dust cloth dusting job Dutch Elm Disease equipment evergreens floor brush flowers flush fungi fungus gallons garden gopher grass ground growing growth handle hazard hole illus maps injury insects installed keep landscape lawn lead arsenate leaf leak leaves manure maple method mixture moisture mowers mulch necessary nitrogen Oglebay Park Park Maintenance pipe pitcher's Pitcher's Plate plant playground prevent proper pruning rake rats recreation removed result Rinse roots rope rose safety seed sewer gas shade trees shrubs slime flux soil spot spray sprinkler stains stem stomata surface toilet bowl trap trees and shrubs valves vines wall wash basin wilt wood x/wk