亚洲成a人片7777,香蕉视频网站在线,韩国一大片a毛片,国产免费观看青青草原网站,范冰冰被强视频,江疏影视频是本人吗,刘诗雯唱歌视频

12.5 nitrogen N-0-38 potassium oxide K2O+2.5 magnesium oxide MgO
Potassium is an activator of many enzymes.
Improving plants absorpt and utilize the nitrogen.
Magnesium is a component of chlorophyll.