heap of red fertilizer in jar. nitrogen n: leaf growth,phosphorus p: development of roots,potassium k: strong stem growth

agricultural agriculture ammonia ammonium background balls blue calcium chemical cultivated dap development diammonium farming fertile fertilizer garden gardening grain green growth growthphosphorus heap industrial industry jar leaf lime liming magnesium material natural nitrate nitrogen npk nutrients orange output phosphate phosphorus pile pill plant potash potassium rating red rootspotassium seed sodium stem strong sulfur tetraoxosulfate urea