1621 R. Brathwait Omphale in 222 Where scalpie hils and sandie vales imply, The ploughmans toile's requited slenderly.
1808 J. Jamieson Scalpy (pron. Scaupy), a term applied to ground, when the soil is thin.
1877 E. Peacock (at cited word) Some's so near th'rock it's scalpy, and, in a way o' speakin', good to nowt.