unplantable features e.g. scree, rock outcrops, boulders, sand, ponds, rivers and streams, buildings and yards, hardstanding and roads
llwyth o frics, cerrig a choncrit o ddymchwel adeilad sydd â darnau bach o bren ynddo ac ychydig bach o blastr ynghlwm wrth y brics am na fyddai wedi bod yn bosibl i gontractwr eu gwahanu