Diagnostic horizons depths

For the Brunisolic soil order the diagnostic horizons are a Bm, Bfj or Btj > 5 cm thick or Bf < 10 cm thick. Consider that Brunisols have undergone only slight development from parent material.

For Gleysol, the diagnostic horizon is a Bg (or Cg > 10 cm thick within 50 cm of the soil surface). Consider the conditions which lead to a gleyed horizon (e.g. Bg).