Ammonium nitrate fertilizer pellets

I wouldn't think it would take much to find where the Dyno Nobel Ammonium nitrate fertilizer pellets got dumped between Cheyenne, Wyoming and California based on this color photo. I'm sure it has rained a few times along this route since. Look for an out of the ordinary patch of lush green vegetation and you will have found it, if not for the bright yellow color of the fertilizer itself. Just remember you can't spell "STUPID" without "UP."