This International Standard describes a method for the determination of the total nitrogen of soil after dry combustion. It is applicable to all types of soil. NOTE — The method was developed originally as a manual method by Dumas [3]. Its applicability is improved greatly due to the use of modern automated equipment.
GSO ISO 13878:2014 history
2014GSO ISO 13878:2014 Soil quality -- Determination of total nitrogen content by dry combustion ("elemental analysis")