This technique uses an Elementar vario MAX cube to determine the total N in the soil. It is based on the method originally described by Dumas and later modified by Sweeny (1989). It operates on the principle of quantification of N2 and CO2 after the total combustion of a 250-350 mg* sample at 900°C in an oxygen and helium rich atmosphere.
(*The exact mass of each sample is recorded and used in our calculations.)
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