2 g100g to mgkg. Uggmgkg 1 ugg 1 mgkg. However the former case denotes the sample being mixed in solid medium or the presence of some ions in the soil for eg.
Mgkgugg 1 mgkg 1 ugg.
Mggugg 1 mgg 1000 ugg. Mgkgugkg 1 mgkg 1000 ugkg. Uggmgg 1 mgg 1000 ugg. Mgkgnlml 1 nlml 1000 mgkg.