NAICS 1151 captures activities and products that facilitate crop production — such as soil preparation, planting, and input supply — rather than the harvested crops themselves. Importers should confirm whether a traded good belongs here or under a primary crop heading, as the distinction affects statistical reporting and, in some cases, regulatory pathway.

It depends on the specific product: pesticides and agricultural chemicals fall under EPA jurisdiction, fertilizers may involve multiple agencies depending on composition, and plant-derived materials or seeds require USDA APHIS phytosanitary clearance. Admissibility is product-specific, so consulting a licensed customs broker is advisable for complex shipments.