Wis. Stat. § 91.42: Land use in farmland preservation zoning districts; general.

A farmland preservation zoning ordinance does not qualify for certification under s. 91.36, if the farmland preservation zoning ordinance allows a land use in a farmland preservation zoning district other than the following land uses:

(1) Uses identified as permitted uses in s. 91.44.

(2) Uses identified as conditional uses in s. 91.46.

(3) Prior nonconforming uses, subject to s. 59.69 (10), 60.61 (5), or 62.23 (7) (h).

(4) Other uses allowed by the department by rule.