-improves soil fertility and texture as it breaks down,
-prevents germination of many weed seeds,
-reduces competition for food and water from grass and weeds,
-reduces erosion,
-helps to maintain soil moisture during dry periods,
-often aids drainage by preventing surface crusting and sealing,
-can keep roots cooler during hot summer weather,
-can help to moderate soil temperature fluctuations,
-reduces frost-heaving,
-reduces potential for soil compaction,
-reduces certain soil-borne diseases by preventing soil and fungi from splashing onto foliage,
-prevents damage from mowers and trimmers,
-and improves the look of the landscape.