Chapter 12 bankruptcy is a hybrid of chapter 13 and chapter 11, for which only "family farmers" can qualify. A family farmer is basically an individual or spouse who gets more than half their income from farming and for whom at least 80 percent of the debt is from the farming practice.
Only a family farmer with regular annual income may be a debtor under chapter 12 of this title.
-- United States Code, Chapter 1, Sec. 109