One millionth of a millimeter. The particles in AgroArgentum® are less than 30 nm in size—small enough to be absorbed directly through the leaf surface.
A nanometer, abbreviated nm, is a unit of length. One nanometer is 10⁻⁹ meters, or one millionth of a millimeter.
The particles in AgroArgentum® are smaller than 30 nm—small enough to be absorbed directly through the leaf surface.
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