The Field:
- Sand based bermudagrass
- Topdressed and aerified regularly
- A higher end playing surface
Back to the photos:
In the first photo, from the turf down, you can see a small sod layer from the sod installed this year along with a small organic layer built up every 1/4 inch.  Why?  That is the amount of sand that is topdressed on an annual basis - much like a ring on a tree.  What is the heavier clay/black layer further down?  That is the sod layer from the original sodding process 6 year ago.
On the second photo you see a more visual difference.  Why?  Thick cut sand based sod grown on plastic was installed in high traffic areas.  So, the sand that was imported is 1 1/2 inch thick.  If you look closely, you can see the sod layer deep into the hole.
Bottom line, take frequent core samples of your field.  This field drains extremely well - in excess of 10 inches per hour, but it still has it's layering challenges.  
Go to j-dturf.com to learn more about J&D Turf.
Play on!
--Jamie
 






