A Horizon

An A horizon, often called the topsoil, is the uppermost layer of soil. It’s rich in organic materials like decomposed plants and animals, which provide essential nutrients for plants. This layer is usually darker in color and is where most plant roots grow and nutrients are concentrated. The quality of the A horizon affects plant health and growth, making it crucial for agriculture and natural ecosystems. Its composition and condition can vary depending on climate, land use, and other environmental factors. Properly maintained, it supports healthy plant development and soil fertility.