A seed treatment system defines angularly spaced compartments for receiving seeds. The compartments are rotatable 360 degrees. A seed processing system is configured to concurrently perform different processing steps in at least some of the compartments as a function of the angular position of the compartment. For example, a seed treatment device can dispense seeds into a compartment, impart treatment, fluidize seeds, apply treatment, control drying of treatment, output seeds from a compartment, and/or prepare a compartment for receiving seeds at certain angular positions of a compartment. Fluidization in a compartment can be used to simultaneously control drying and evenly coat seeds with a treatment component.
