Potassium fertilizers
Potassium fertilizers may also influence Cd availability to crops, through effects on plant growth, soil pH, ionic strength of the soil solution complexation, and/or ion competition (Grant et al., 1996). Under field conditions, KCl increased Cd concentrations in barley (Grant et al., 1996). The accompanying ion in the potassium fertilizer may have a strong effect on Cd availability. In pot studies with spring wheat, Cd accumulation and concentrations in plant shoots increased with increasing application rates of KCl and potassium sulfate (K2SO4) from 0 to 166 mg K kg− 1 with no significant differences occurring between the two K sources
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