74ad7966_Nutrition__Toxicity
[Element] Potassium [Deficiency] older leaves chlorotic, with scattered dead spots. uneven ripening in fruit (blotchy) remedy: use foliar spray of 2% potassium sulfate [Toxicity] 
not usually absorbed by plants in excessive amounts, but high levels may lead to deficiencies in Mg, Mn, Zn, or Fe
Nutrition
Toxicity