Thus, if a fertilizer is 30% potassium chloride by weight, its standard potassium rating, based on potassium oxide, would be only 18.8%.
Sehingga, apabila pupuk mengandung 30% kalium klorida berdasarkan berat, standar pemeringkatan kalium, berdasarkan kalium oksida, akan menjadi hanya 18.8%.