This standard specifies the method for the determination of total potassium content in organic-inorganic compound fertilizers. This standard applies to organic-inorganic compound fertilizers composed of organic fertilizers and chemical fertilizers, and also applies to the determination of the total potassium content of various pure organic fertilizers.
GB/T 17767.3-1999 history
2010GB/T 17767.3-2010 Determination of organic-inorganic compound fertilizers-Part3 :Total potassium content
1999GB/T 17767.3-1999 Determination of total potassium content for organic-inorganic compound fertilizer