Farmers. This is supported by the Septuagint, Peshito, Targum, Vulgate, according to the Massoretic pointing, however, we should render "enemies." Possibly the prophet intended to suggest both meanings, a and o being so nearly related.
Shall empty her land. The original has a much mere striking word, shall pour out (for the figures, comp. Jeremiah 48:12), which occurs again in similar contexts in Isaiah 24:1; Nahum 2:3 (Hebrew, 2).