The crossword solution for the term RELATING TO SOIL is PEATY, which is a five-letter word. Peaty soil is a type of soil that is composed of partially decomposed organic matter, such as plant material, and is found in wetlands and bogs. It is often used as a soil amendment to improve soil structure and fertility. Peaty soil is also known for its ability to retain moisture, making it an ideal choice for gardening and landscaping.