This document specifies the procedure for the extraction of phosphorus soluble in Joulie's alkaline ammonium citrate. The method is applicable to all the straight and compound phosphate fertilizers@ in which the phosphate occurs in an alumino-calcic form.
EN 15923-2011由CEN - European Committee for Standardization 发布于 2011-06-01,并于 2011-06-23 实施。
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