Mo. Rev. Stat. § 67.1230
Any county in which large scale commercial agriculture commodity production is a significant part of the county's economic base may, by vote of the governing body of the county and shall upon receipt of petitions signed by at least ten percent of those persons qualified to vote on the proposal under the provisions of this section, submit to persons in the county who own land devoted to the production of commercial agricultural commodities a proposal to create a countywide commodity research district with an assessment of a fee not to exceed twenty-five cents per acre on all land within the county on which commercial agricultural commodities are produced. The proposal shall be submitted to owners of land within the county which is classified for assessment and taxation purposes as agricultural and horticultural property and which is used for the production of the agricultural commodities, including but not limited to: livestock and livestock products, including but not limited to cattle and calves, hogs, dairy products, turkeys, broilers, chicken eggs, sheep and lambs, aquiculture, and honey; and crops, including but not limited to soybeans, cotton, peanuts, cow peas, wheat, corn, oats, barley, kafir, rye, flax, grain sorghum, rice, tobacco, apples, grapes, peaches, cucumbers, potatoes, and other vegetables and fruits intended for human or animal consumption if the income derived from the production of such agricultural commodities constitutes at least fifty percent of the total gross income derived from the land so classified.
§ 67.1230, RSMo