US Patent 7445657 Application methods for fine powders and uses thereof

A method of preparing and coating fertilizer pellets is described. Fertilizer, seed or other materials are added to a blender. Powdered micronutrients are added to the blend (at any time in the process) at rates up to but not exceeding 1% of the total blend. The resulting blend is mixed for a minimum of 20 seconds resulting in an even distribution (coating) of the total blend. The blend is then packaged into bags, spreaders or trucks and stored or applied to the field. Seed or fertilizer is augured or moved via conveyors or other means into seeding equipment or a blender. The finished product is then applied to the field or stored for later applications.