What is one requirement for Trained Applicators to maintain their certification?

Maintaining certification as a Trained Applicator requires annual training, which ensures that applicators stay updated on best practices, regulations, and advancements in fertilizer application techniques. This requirement is crucial for promoting environmental stewardship, safe handling of fertilizers, and compliance with state and federal regulations. By participating in annual training, applicators can also enhance their skills, knowledge, and awareness of any changes in the industry, ensuring that they are equipped to minimize risks associated with fertilizer application and understand new research and technologies that may impact their work.

The other options suggest less frequent training or one-time compliance, which would not sufficiently ensure that applicators are kept informed about ongoing developments in practices and regulations affecting fertilizer use. Regular yearly training aligns more closely with the need for continuous education in a field that can evolve due to new research findings and changes in policy.