▁About ▁ 5 8 % ▁of ▁the ▁v ine yard ▁area ▁that ▁existed ▁in ▁ 1 9 0 0 ▁has ▁since ▁become ▁a ▁was t eland ; ▁another ▁ 1 6 % ▁lies ▁fall ow ▁ 4 0 ▁to ▁ 8 0 % ▁of ▁the ▁time . ▁ ▁Some ▁ ▁remains ▁and ▁the ▁tr end ▁is ▁decre asing : ▁in ▁ 2 0 0 6 , ▁only ▁ ▁of ▁that ▁ 4 8 0   he ct ares ▁was ▁actually ▁used ▁to ▁grow ▁g rap es . ▁ ▁The ▁was tel ands ▁are ▁over g rown ▁with ▁bush es ▁and , ▁over ▁time , ▁they ▁revert ▁to ▁being ▁for ests . ▁ ▁This ▁is ▁a ▁big ▁problem . ▁ ▁If ▁we ▁want ▁to ▁retain ▁the ▁character ▁of ▁the ▁landscape , ▁we ▁will ▁have ▁to ▁find ▁new ▁uses ▁for ▁the ▁terra ces , ▁or ▁at ▁least ▁maintain ▁them ▁and ▁keep ▁them ▁open . ▁ ▁The ▁Land ▁cons olid ation ▁ ▁program ▁at ▁the ▁O els berg ▁in ▁Ober w es el ▁provides ▁a ▁successful ▁example ▁of ▁pres erving ▁the ▁terra ces ▁without ▁major ▁movement ▁of ▁d irt . ▁ ▁By ▁creating ▁trans verse ▁terra ces ▁and ▁construction ▁of ▁a ▁d rip ▁ir rig ation ▁system , ▁the ▁characteristic ▁small ▁parc els ▁could ▁be ▁retained ▁for ▁the ▁vit icult ure ▁industry . ▁ ▁At ▁Bach ar ach , ▁a ▁smooth ▁transformation ▁to ▁facil itate ▁the ▁maintenance ▁of ▁the ▁tre ll is ▁is ▁in ▁the ▁planning ▁stage . ▁ ▁Part icular ly ▁distinct ive ▁land marks