1834, The Southern Agriculturist and Register of Rural Affairs: Adapted to the Southern Section of the United States, page 421:
My usual habit is, as soon as I get my wheat trodden out, and my corn secured in the fall, to litter my farm yard (and if my cultivation is far off, I select some warm spot near the field) with leaves and pine shatters, (preferring the former) ...
1859, Samuel W. Cole, The New England Farmer, page 277:
They are preserved in cellars, or out of doors in kilns. The method of fixing them is to raise the ground a few inches, where they are to be placed, and cover with pine shatters to the depth of six inches or more.
2012, Marguerite Henry, Sea Star: Orphan of Chincoteague, Simon and Schuster (ISBN 9781442488045), page 95:
Grandpa snapped his fingers. "Consarn it all!" he sputtered. "I plumb forgot the pine shatters. Paul and Maureen, you gather some nice smelly pine shatters from off 'n the floor of the woods. Nothin' makes a better cushion for pony feet as pine shatters ..."