THE ULTIMATE GUIDE TO NPK FOR AGRICULTURE

The first inorganic source of potassium for use in NPK fertilizers is potash. Like phosphate rock, potash is mined everywhere in the world and processed into a far more refined product. Potassium might also come from potassium sulfate, langbeinite, and granite dust.Remember All those tasty tomatoes and exquisite roses you grew last yr? It took nutr