DS DS/EN 15923
DS DSEN 15923 2011-JUL-07 Fertlzers - Extracton of phosphorus soluble n Joule's alcalne ammonum ctrate
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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.