Prior to harvest, prohibited substances must not be applied to land in organic production for how many years?

In organic production, maintaining the integrity and purity of the crops is essential. The correct answer indicates that prohibited substances must not be applied to the land for a minimum of three years prior to harvest. This three-year period allows for soil health to improve and for any residues of prohibited substances to diminish, ensuring that the organic crops produced meet the stringent standards required for organic certification.

This three-year timeframe is aligned with regulations set forth by the USDA National Organic Program, which aims to promote long-term soil health and sustainable agricultural practices. It serves as a transitional period that reflects the commitment to organic farming's ecological principles. During these three years, farmers must manage their land practices to clean the soil and support the organic system’s integrity.