The majority of soil's organic matter is concentrated in the ____.

Question

The majority of soil's organic matter is concentrated in the ____.​

Quizplus · Accepted Answer

The O horizon is composed of organic matter, primarily from decomposed plant material such as leaves, twigs, and grass. The A horizon is also rich in organic matter, and is commonly referred to as topsoil. Therefore, the majority of soil's organic matter is concentrated in both the O and A horizons. The C horizon is composed primarily of weathered rock fragments and lacks significant amounts of organic matter. The B horizon is composed of mineral material that has been leached from the A horizon and accumulates beneath it, and contains little organic matter.

The Majority of Soil's Organic Matter Is Concentrated in the ____.​

The Majority of Soil's Organic Matter Is Concentrated in the ____.