UNE-EN ISO 23753-1:2019/A1:2020
Soil quality - Determination of dehydrogenases activity in soils - Part 1: Method using triphenyltetrazolium chloride (TTC) - Amendment 1 (ISO 23753-1:2019/Amd 1:2020) (Endorsed by Asociación Española de Normalización in January of 2021.)