Qhov sib txawv tseem ceeb ntawm MAP thiab DAP chiv yog tias MAP chiv muaj txog 10 feem pua nitrogen, thaum DAP chiv muaj txog 18 feem pua nitrogen.
MAP thiab DAP chiv yog hom ammonium chiv. Cov chiv no tau siv dav rau kev ua liaj ua teb raws li qhov chaw ntawm nitrogen thiab phosphorus. Phosphorous muaj nyob rau hauv daim ntawv ntawm P2O5, thaum nitrogen tshwm sim nyob rau hauv daim ntawv ntawm ammonium.
