The impact of fertilizers on the uptake of manganese in Cherry Belle radish plants: implications for human health.

Miracle-Gro Singles, Miracle-Gro Shake and Feed, and Vigoro fertilizers are associated with net loss/enhancement of Mn, up to an order of magnitude when referenced to controls in soil, radish vegetables, and radish leaves; Mn enhancements are a factor of 4 to 65 below the daily required intake for humans (2-5.5 mg/day). Manganese levels were measured by atomic absorption spectrometry (AAS).