John Deere 7780 ProDrive Chopping the 2014 Corn Silage Crop August 27, 2014 by farmlifetoday bigtractorpowerWed, August 27, 2014 5:32amURL:Embed:John Deere 7780 ProDrive Chopping the 2014 Corn Silage Crop Follow us on Facebook at https://www.facebook.com/bigtractorpower