The commissioner of natural resources must classify all public and private lands in the state by the use to which the lands are adapted, but principally as to adaptability to present known uses, such as agriculture and forestry. This classification must be based on consideration of the known physical and economic factors affecting use of the land. The commissioner must consult private, state, and federal agencies concerned with land use. The commissioner may appoint advisory committees of residents of the state concerned with and interested in land use. The advisory committees shall serve without pay, at the pleasure of the commissioner. The advisory committee must consider and report on land use problems submitted by the commissioner. The classification must be done first in the counties having land classification committees. In determining the land classification, the commissioner must consult and cooperate with the land classification committee. The determination of the land classification committee is final.