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Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates Ingestion-build-135476 Basic formulae of the scaleBS EN 15561: 2009 Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates BS EN 15561 specifies a method for the determination of total nitrogen in calcium cyanamide. The method is applicable to calcium cyanamide containing nitrates. Contents of BS EN 15561: Foreword Scope Normative references Terms and definitions Principle Reagents Apparatus Sampling and sample preparation Procedure Calculation and expression of the