Nitrogen fertilizers are based on ammonia, which can be used directly as a fertilizer or converted to solid compounds (urea, ammonium phosphate, ammonium nitrate, and ammonium sulphate) or to nitrogen solutions.
Les engrais azotÃ©s sont faits Ã partir d'ammoniac, qui peut Ãªtre utilisÃ© directement comme engrais ou transformÃ© en composÃ©s solides (urÃ©e, phosphate d'ammonium, nitrate d'ammonium et sulfate d'ammonium) ou en solution azotÃ©e.