Soil horizons are distinct layers of soil that develop over time due to the influence of various factors such as climate, vegetation, and parent material. They are typically designated with letters (O, A, E, B, C, R) to represent their unique characteristics.
* O Horizon: This is the uppermost layer, composed of organic matter like leaves, twigs, and decomposing organisms.
* A Horizon: This is the topsoil, rich in organic matter, minerals, and nutrients. It's typically dark in color and has a crumbly structure.
* E Horizon: This is a zone of leaching, where minerals and nutrients have been washed away by water. It's often light-colored and sandy.
* B Horizon: This is the subsoil, where accumulated minerals and nutrients form distinct structures. It can have a variety of colors depending on its composition.
* C Horizon: This is the weathered parent material, from which the soil above is derived. It's often fragmented and less developed than the layers above.
* R Horizon: This is the bedrock, the unweathered parent material from which the soil is formed.
By examining the soil horizons, scientists can learn about the soil's history, its fertility, and its suitability for different uses.
