Spacing Between Passes of a Rotary Spreader

I saw a rather alarming pattern in a new stand of turf this week.  Here is what I saw:

What caused this problem?  Inadequate overlap from repeated rotary spreader applications.  What is the correct overlap?  Dr. Zac Reicher explains in this Purdue University Turf Tip.

Go to j-dturf.com to learn more about J&D Turf.

Play on!
--Jamie
@JamieMehringer