The illustration shows changes taking place in abandoned fields of the Carolinas’ Piedmont. Basis time, drawing is divided vertically in to four sections using dotted lines.

1. Within 3 years - Few small plants can be seen.
2. Between 3 to 5 years -Many plants started to grow.
3. Between 5 to 40 years - Oak trees started to grow.
4. After more than 40 years - Field has matured into oak forests.