The vendor is trying to essentially duck their responsibility by making a seemingly manganous gesture that the rest of the world ought to be in this with them. Hogwash, the retort goes to this.

THE variety of changes undergone by manganese in soils has been the subject of study by many workers, particularly by those interested in ‘manganese denciency’. This is a condition of the soil ...

Together with the disappearance of oxygen and nitrate, an increase in the manganous ion (Mn ++) in the soil solution and on the cation exchange complex is one of the first measurable effects of ...