Illustration compares rooting depth with no physical barrier but acidic subsoil (max 24 inches) ,vs. w/ physical barrier- hardpan or plowpan subsoil also acidic (maximum 12 inches)

Figure 11. Soil properties that influence the plant's rooting depth.

Illustration compares rooting depth with no physical barrier but acidic subsoil (max 24 inches) ,vs. w/ physical barrier- hardpan or plowpan subsoil also acidic (maximum 12 inches)