Minn. Stat. § 92.36: LANDS CLASSIFIED.

Upon the basis of all of the facts concerning land use now obtainable and as provided in sections 92.34 to 92.37 the commissioner of natural resources shall temporarily classify land areas with reference to the known uses to which the areas are adapted or adaptable. A certified copy of the temporary classification, together with a brief statement of the reasons for it, must be recorded in the office of the county recorder in each county containing the lands classified. No fees need be paid for this recording. After the temporary classification has been adopted by the commissioner, none of the lands classified as nonagricultural may be sold or leased by the state for agricultural purposes.