Understanding solubility is vital when applying fertilizers through irrigation (fertigation).

Highly soluble fertilizers include ammonium nitrate (1830 g/l), urea (1100 g/l), and ammonium sulphate (760 g/l), all contributing mainly nitrogen. Potassium sources like potassium chloride (347 g/l), potassium nitrate (316 g/l), and potassium sulphate (110 g/l) also dissolve well, supporting fruit and flower development.

Phosphorus-rich compounds such as monoammonium phosphate (282 g/l), diammonium phosphate (575 g/l), monopotassium phosphate (230 g/l), and phosphoric acid (457 g/l) are moderately soluble and ideal for fertigation in phosphorus-deficient soils.