NIGERIAN BLOG
Wefinder24.com is designed to help students, researchers and cooperate body to obtain relevance and valuable in formation they need from web. it is our objectives that in the nearest possible time, we hope to become “Online Wikipedia” and be most reliable educational resources center for students and researchers in the globe
Horizons and Boundaries of Soil. As you observe a soil profile pit or a roadside cut, you will see various layers in the soil. These layers are called soil horizons, whereas the arrangement of these horizons in a soil is known as a soil profile. A pedologists or an experienced soil scientist, observe and describe soil profiles and soil horizons to classify and interpret the soil for various uses. Soil horizons differ in a number of easily seen soil properties such as color, texture, structure, and thickness. Other properties may be less visible. Properties, such as chemical and mineral content, consistence, and reaction require special laboratory tests.
The distinction between a mineral and an organic horizon is by the organic carbon content. Layers which contain > 20 % organic carbon and are not water saturated for periods more than a few days are classed as organic soil material. If a layer is saturated for a longer period it is considered to be organic soil material if it has: · ≥12 % organic carbon and no clay, or 1. 2.