Enrolled land that is in agricultural use or forest reserve is excluded from this requirement.Buff said:§ 137b.64. Agricultural reserve land to be open to the public.
(a) General. An owner of enrolled land that is enrolled as agricultural reserve land shall allow the land to be open to the public for outdoor recreation or the enjoyment of scenic or natural beauty without charge or fee, on a nondiscriminatory basis. Enrolled land that is in agricultural use or forest reserve is excluded from this requirement.
(b) Actual use by public not required. Enrolled land that is enrolled as agricultural reserve land need not actually be used by the public for the purposes described in subsection (a) to continue to receive a preferential assessment. It shall, however, be available for use for those purposes.
(c) Reasonable restrictions on use allowed. A landowner may place reasonable restrictions on public access to enrolled land that is enrolled as agricultural reserve land. These restrictions might include limiting access to the land to pedestrians only, prohibiting hunting or the carrying or discharge of firearms on the land, prohibiting entry where damage to the land might result or where hazardous conditions exist, or other reasonable restrictions.
(d) Entry upon the agricultural reserve land. A person shall, whenever possible, notify the landowner before entering upon enrolled land that is enrolled as agricultural reserve land. The landowner may deny entry when damage to the property might result. The landowner can prohibit entry to areas of the agricultural reserve land upon prior notification to the county assessor of the existence of a hazardous condition on that land. The landowner’s reasons to deny entry to the land shall be based upon fact and be acceptable to the county assessor.
Please note, MOST Clean and Green is enrolled this way.
Therefore, the land owner can post it and keep everyone out.