Tremendous changes the past six months:
Each row is now named after its type (eg. Cedar Avenue) of wood.
New citizens are trained in picking sprouts and replanting trees they harvest in this area.
A shelf, also known as a ledge, is a narrow, (more-or-less) flat spot along an otherwise (mostly) vertical face.
This project is going to be one of the hardest (eg. like the mine project), but it will also one one of the most rewarding when complete.