Article content Now that the leaves have fallen off and the crops are in, we move into the season of erosion. It’s inevitable when soil is left bare and exposed. The main elements that cause the erosion are snow, ice, wind and, perhaps the most damaging, water. We apologize, but this video has failed to load. Try refreshing your browser. To till or no-till, that is the question ... Back to video Water will take that precious topsoil out to the drains, creeks, the Thames River and eventually end up at the bottom of Lake Erie. This is evident by the giant brownish plumes seen on Lake St Clair and Lake Erie from Google Earth images.