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介绍利用精密ＰＨ试纸分别测定肥料中Ｋ＋和ＮＨ＋４，该法分析一个样品仅需几分钟，且不需要专门的仪器特别适用于现场快速、简单测定肥料中钾和铵含量。
Introduction The use of precision PH test strips for the determination of K + and NH + 4 in fertilizers, respectively, requires only a few minutes for one sample to be analyzed by this method and does not require specialized instruments for rapid and simple determination of potassium and ammonium in fertilizers.