Figure 11.
Figure 11.
Roots growing in crevices of bricks. There was no oxygen below the bricks which overlie a compact clay on the N.C. State University Campus. Tree roots commonly follow cracks and crevices or air passages under pavement.
Roots growing in crevices of bricks. There was no oxygen below the bricks which overlie a compact clay on the N.C. State University Campus. Tree roots commonly follow cracks and crevices or air passages under pavement.