Mulch 3 : Natural or artificial layer of plant residue pr pther material covering the land surface which conserves soil moisture, holds soil in place, aids in establishing plant cover, and minimizes temperature fluctuations
EESiFlo North America, Terminology and Glossary: Water and Wastewater Terms, Pennsylvania, USA 2002. flowmeterdirectory.com/flowmeter_terminology, (Wtr and Wastewater - Amer) {559}