Leaves falling on the ground initially become a part of soil horizon __________, but will later be a component of soil horizon __________.

Question

Quizplus · Accepted Answer

Leaves falling on the ground initially become a part of the O horizon (organic layer) of soil, which consists mainly of organic matter, including decomposing leaves and other plant debris. Over time, this organic matter will break down and become a component of the lower A horizon (topsoil). Therefore, the correct choice would be O; A. Option C is the only one that matches this sequence.

Leaves Falling on the Ground Initially Become a Part of Soil