The term 'Erosion Loss' refers to the process of SOIL being worn away by wind or water. The crossword solution for this term is 'SOIL', which is a four-letter word. SOIL erosion is a natural process that occurs when wind and water remove particles of SOIL from the surface of the earth. This process can be accelerated by human activities such as deforestation, overgrazing, and poor agricultural practices. Erosion loss can lead to decreased fertility of the SOIL, increased sedimentation in rivers and streams, and other environmental problems.