mulch
noun(mulch)
a protective covering (as of sawdust, compost, or paper) spread or left on the ground to reduce evaporation, maintain even soil temperature, prevent erosion, control weeds, enrich the soil, or keep fruit (such as strawberries) clean
mulch
noun(mulch)
a lightly tilled mulch of plant residue used to prevent erosion, conserve moisture, and add organic matter to the soil