M?c L?cS? m?nh c?a OECDM?c tiêu c?a OECDC? c?u t? ch?c c?a OECDH?i ??ngBan Th? kýThành viênCh?c n?ng c?a OECD OECD là gì? OECD – …Vietnam sulphate of potash, also known as SOP, or potassium sulfate or potassium sulphate. That is a fully water-soluble potassium and Sulphur fertilizer and free of heavy metals.Xác ??nh nhu c?u kali c?a cây