Ind. Code § 15-16-1.5-9
"Blending" means the physical mixing or combining:
(3) of two (2) or more commercial fertilizers and filler materials;
including mixing through the simultaneous or sequential application of any of the combinations referred to in subdivision (1), (2), or (3) to produce a uniform mixture.
As added by P.L.98-2026, SEC.2.