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Agricultural zoning laws aim to protect farmland and regulate land use. In Pennsylvania, the [Agriculture Security Area law](https://extension.psu.edu/agricultural-security-areas) allows landowners to enroll their farms in a program that protects them from certain municipal regulations. In Iowa, the [Corn Suitability Rating](https://www.extension.iastate.edu/soils/csr) system guides zoning decisions to preserve prime farmland. Many states, like [New York](https://agriculture.ny.gov/ap/agservices/agricultural-districts.html), have agricultural district programs that offer tax incentives and protections for farmers. These laws vary across states but generally aim to support and preserve agricultural land.