Difference in solubility with temperature change

Notice that the solubility of fertilizers varies at different temperatures.

Below is a table with some examples (g/100ml).

Temperature Potassium
nitrate
Potassium
chloride (KCl)
Potassium
sulphate
Ammonium
nitrate
Urea
50oF 10oC 21 31 9 158 84
68oF 20oC 31 34 11 195 105
86oF 30oC 46 37 13 242 133
 

The higher the temperature, the higher the solubility of the fertilizer.

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