Pines tend to produce 'red root". I think it is from the sap on the ground..but I'm not sure. Red root is not at all desirable through.
In my area it is relatively flat, so I really am not familiar with the elevation aspect. I'm sure, however, there is a zone where ginseng would do best on the side of a big hill or mountain.
I've had negative results with calcium in the past. One thing to consider, which Beyfuss mentioned in one of his presentations, is that in healthy populations of wild ginseng they most often found the calcium to magnesium ratios were 10:1. Also, he cautioned about adding too much calcium because when this gets out of whack in relation to other soil chemicals/elements, the chemical composition begins to change and for instance nitrogen can be released which might encourage some diseases.