1.   Dirt surface most of the way.

2.   Mohammed brought in Singspiel, even though the horse had never raced on a dirt surface.

3.   So, his trainer, Bill Mott, switched him to dirt surfaces.

4.   Thoroughbred owners and trainers will have a new dirt surface to check out Thursday when Del Mar opens its doors for another summer of racing.

5.   Truffles are the fruiting body of a tree root fungus usually found just under the dirt surface.

6.   Skies were dark and foreboding throughout as footing becoming trecherous on the muddy dirt surface.