The floor and the wine-press shall not feed them, and the new wine shall fail in her. Thus Israel was not to enjoy the blessings of the harvest; the corn and oil and new wine, or corn and wine, would not prove as abundant as they expected or plenty would be succeeded by scarcity; or, rather, the people would be prevented enjoying the abundant produce of their land in consequence of being carried away captive to Assyria, as seems implied in the following verse.
The floor and press—whether wine-press, or rather oil-press, as the mention of new wine follows—are put for their contents by a common figure of speech. The expression, "fail in her," is literally, "lie to her," and has many parallels; as, "The labor of the olive shall fail [margin, 'lie']," and Horace's "fundus mendax," equivalent to "a farm that belies his hopes."