What's on, and in, the horizon?
you know that there are horizons in the soil? They're named O, A, B,
and C. O is the top horizon. It's about an inch thick made up of
dead stuff that breaks down and keeps the soil "O"-
so healthy. The A
horizon is topsoil that's alive with roots, tiny microstuff like
bacteria and fungi, and all kinds of critters like me. The A horizon is
"A-OK" with me. Number three is horizon B. Plants and animals have a
tough time getting through B. Why? "B"-
cause it's very hard. See horizon
C? You see, horizon C has less living stuff in it than O, A, and B. C is
parent material that's made up of the rock and soil that formed the
three layers above it.