Nashville notes Burke/Triolo Productions/ThinkstockLate country legend Merle Haggard, who died in 2016, is a co-writer on Sturgill Simpson ’s “Hobo Cartoon.” The new song is included on the track list of an album called Cuttin’ Grass Vol. 2, which Sturgill surprise-released last week. David Nail dropped his new Bootheel 2020 EP on Friday. Known for chart-topping hits like “Let it Rain” and “Whatever She’s Got,” the singer has adopted a more organic, reflective sound in his recent releases. “Copperhead Road” singer J.T. The upcoming album is a tribute to his late son, artist Justin Townes Earle, who died in August.