▁into ▁the ▁ground ▁as ▁a ▁further ▁obst acle . ▁This ▁resulted ▁in ▁the ▁so - called ▁Geb ück , ▁a ▁pla ited ▁h edge . ▁Under store y ▁bush es , ▁such ▁as ▁dog ▁rose , ▁wh it eth orn , ▁black th orn ▁or ▁br amb les ▁, ▁were ▁used ▁to ▁make ▁the ▁h edge ▁im pen et rable . ▁Hence ▁the ▁local ▁name , ▁Ged ör n ▁(" th orn ▁h edge ") ▁used ▁in ▁some ▁places . ▁The ▁site ▁was ▁kept ▁clear ▁of ▁higher ▁veget ation . ▁The ▁ground ▁in ▁front ▁was ▁largely ▁cleared . ▁ ▁The ▁construction ▁of ▁a ▁def ensive ▁h edge ▁was ▁described ▁by ▁a ▁priest ▁at ▁E ber bach ▁Ab bey ▁in ▁ 1 7 9 0 : ▁ ▁With ▁regular ▁maintenance ▁and ▁care ▁( he ge ), ▁a ▁n igh ▁im pen et rable ▁wood land ▁strip ▁was ▁created ▁in ▁the ▁course ▁of ▁a ▁de cade . ▁More ▁elaborate ▁land wehr s ▁with ▁a ▁def ensive ▁function ▁consisted ▁of ▁several ▁parallel ▁d itch es ▁and ▁banks , ▁plant ed ▁with ▁h ed ging . ▁In ▁particular , ▁double ▁d itch es ▁were ▁designed ▁to ▁prevent ▁them ▁from ▁being ▁jump ed ▁by ▁hors emen . ▁Another ▁design ▁was ▁the ▁so - called ▁We hr heck e ▁( W all heck e ▁or ▁Kn ick ), ▁a ▁h edge - pl anted ▁bank , ▁for ▁the ▁maintenance ▁of ▁which ▁a ▁tax ▁called ▁Kn ick g eld ▁was ▁raised . ▁ ▁In ▁H esse , ▁at ▁the ▁end