topsoil
UK: ˈtɒpsɔɪl | US: ˈtɑːpsɔɪl
n. The upper layer of soil, typically rich in organic matter and nutrients, where most plant roots grow.
The word "topsoil" is a straightforward compound of "top" (from Old English topp, meaning "highest point") and "soil" (from Old French soil, meaning "ground" or "earth"). The term logically describes the uppermost layer of soil, which is vital for agriculture due to its fertility. The combination reflects a practical, descriptive approach to naming this essential natural resource.
Farmers prioritize preserving topsoil to maintain crop yields.
Heavy rains can erode topsoil if the land is not properly terraced.
The garden’s topsoil was enriched with compost for better plant growth.
Construction projects often require removing topsoil before laying foundations.
Healthy topsoil contains a balanced mix of minerals, organic matter, and microorganisms.