§ 147-c. Label requirements. Each soil or plant inoculant, when sold or offered or exposed for sale within this state, shall be clearly and plainly labeled to show whether the inoculant is represented as effective for inoculating legumes or for some other purpose, and if represented as effective for the inoculation of legumes, for which legume or legumes it is so represented; and the date to which the inoculant is represented to produce effective inoculation.