Outdoor production areas are commonly known as: agricultural fields, commercial forests (timber), and nurseries.
CFR §170.305: Outdoor production means production of an agricultural plant in an outside area that is not enclosed or covered in any way that would obstruct the natural air flow.
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Regulatory Guidance
Browse brief guides about protections for workers and handlers, the AEZ, posting, PPE, exemptions, training, respirators, and more, in English and Spanish.