DIN 4220 Pedologic site assessment - Designation, classification and deduction of soil parameters (normative and nominal scaling)*, 2020-11-01 Update
DIN 19682-13:2009 history
2009DIN 19682-13:2009 Soil quality - Field tests - Part 13: Determination of carbonate, sulfide, pH-value and iron(II)-ions
1997DIN 19682-13:1997 Methods of soil investigations for agricultural water engineering - Field tests - Part 13: Determination of carbonate, sulfide, ph-value and iron(II)-ions