0.002 mm), soil organic matter (SOM), air, and water. The balanced contributions of these components allow for water retention and drainage, oxygen in the root zone, nutrients to facilitate crop ...

as workers lay the first layers of soil on the overpass. The Wallis Annenberg Wildlife Crossing spans the 10-lane freeway in Agoura Hills and will become the largest such crossing in the world.

Crews will begin placing soil on the bridge ... working to ensure that "beneficial fungi" play a role in these crucial layers. Coastal sage scrub plants, the "species native to the Santa Monica ...