PLEASE ANSWER ASAP DUE IN 10 MINUTES
Which horizon do only old soils and forest soils have?

The O horizon is an organic layer made of wholly or partially decayed plant and animal debris. The O horizon generally occurs in undisturbed soil, since plowing mixes the organic material into the soil. In a forest, fallen leaves, branches, and other debris make up the O horizon.

Explanation: Hope this helped! <3

The A Horizon is the upper surface or topsoil and usually has the highest organic matter content; the B Horizon is the subsoil; and the C Horizon is the parent material. A given soil may have one or all three horizons. that are present, the older the soil. The thicker the horizons, the older the soil.

Explanation:

hope this helps have a great day

ok

explanation: