A build-up of soil particles and similar materials that cling to carpet fibers. Thorough and frequent vacuuming is the key. If vacuuming is not enough, itÂ’s time for a professional cleaning. Found on http://www.camelotcarpetmills.com/glossary_of_terms
soiling, agricultural practice of feeding green fodder to livestock in the barn or dry lot. It is followed in the United States mostly in the dairy industry in seasons when pastures are short, but in Europe more generally. For best results the crop must be cut daily. Among the crops used for soiling... Found on http://www.infoplease.com/ce6/sci/A0845819.html