PO 28. Describe the physical form and analysis of each of the following potassium sources.

1. Potassium chloride
2. Potassium sulfate
3. Potassium nitrate
4. Potassium magnesium sulfate

Potassium chloride: KCl Fertilizer grade: Contains 60-63% K2O Physical form: solid Most abundantly used potassium fertilizer Often referred to as Muriate of Potash Water soluble source of K Potassium sulfate: K2SO4 Fertilizer grade: 50% K2O Physical form: solid Potassium nitrate: KNO3 Fertilizer grade: contains about 13% N, 44% K2O Physical form: solid Potassium magnesium sulfate: K2SO4•MgSO4 Contains about 22% K2O, 11% Mg, 22% S Physical form: solid, water-soluble Good source of Mg and S Often referred to as Sul-Po-Mag or K-Mag

 

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