Fertilizers - Determination of total nitrogen in urea
Fertilizers - Spectrophotometric determination of biuret in urea
Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
Inorganic fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
Inorganic fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
Inorganic fertilizers - Determination of cyanamide nitrogen
Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
Foods of plant origin - Multimethod for the determination of pesticide residues using GC- and LC-based analysis following acetonitrile extraction/partitioning and clean-up by dispersive SPE - Modular QuEChERS-method
Fertilizers - Determination of urease inhibitor N-(n-butyl)thiophosphoric triamide (NBPT) using high-performance liquid chromatography (HPLC)
Agricultural and forestry tractors - Passenger seat - Requirements and test procedures
Agricultural tractors and self-propelled sprayers - Protection of the operator (driver) against hazardous substances - Part 1: Cab classification, requirements and test procedures
53,361 distinct reference strings indexed from official source snapshots accessed on 19 October 2026. Includes earlier editions. The index and publisher collections have different coverage. See sources and coverage.