DETAILED NOTES ON BULK NPK 20-20-20

The first inorganic source of potassium for use in NPK fertilizers is potash. Like phosphate rock, potash is mined all over the world and processed right into a extra refined product. Potassium can also come from potassium sulfate, langbeinite, and granite dust.Liquid fertilizers are usually more economical, uniform, and quick-acting than granular