A food establishment consists of an operation that stores, prepares, packages, serves, vends, or produces food meant for human consumption. Food served in such establishments must come from sources that have local approval. They can utilize produce grown on-site or from licensed agricultural producers, who are accountable for ensuring the safety of their produce in adherence with applicable regulations. The producer is required to operate a facility inspected by the United States Department of Agriculture. Food establishments should acquire their goods from those certified in Good Agricultural Practices and Good Handling Practices.
I'm inclined to think it is C An increase in nitrogen-fixing bacteria activity, but I’m not entirely certain
