The Ministry of Agriculture in Brazil has published a series of ordinances approving the Agricultural Zoning of Climate Risk (Zarc) for the cultivation of castor beans for the crop year 2022/2023. The Zarc system, updated in 2020, is designed to mitigate climate risks and guide farmers on suitable cultivation areas based on criteria such as water needs, temperature, and rainfall. The system also includes an auxiliary criterion for gray mold escape in humid regions. Adherence to Zarc can make farmers eligible for agricultural subsidies and credit access. The Zarc Plantio Certo mobile application provides easy access to Zarc information.