Shade tree root zone care avoids soil piles against trunks, aerates compacted areas

https://www.scribd.com/document/1048616807/Erosion-Control-Plant-Palettes-for-Pasadena-Hillsides-226489

Shade tree root zone care avoids soil piles against trunks, aerates compacted areas, and uses mulch rings to reduce mower damage and conserve moisture.