NPK 20-20-20 FERTILIZER GRANT PROGRAMS - AN OVERVIEW

The primary inorganic source of potassium to be used in NPK fertilizers is potash. Like phosphate rock, potash is mined everywhere in the environment and processed into a a lot more refined product. Potassium also can come from potassium sulfate, langbeinite, and granite dust.كما ذكرت بالأعلى يتم استخدام هذه الأنواØ