Onqelos actually matches MT here.
Leviticus 26:19–20The NET Bible First Edition Notes
Notes for 26:20 31 tn Heb “the tree of the land will not give its fruit.” The collective singular has been translated as a plural. Tg. Onq., some medieval Hebrew MSS, Smr, LXX, and Tg. Ps.-J. have “the field” as in v. 4, rather than “the land.”