[robocat]

> which means you would have to plant 1T + X0B extra to cover the dead loss

It depends if the dead trees are in groups that leave large gaps in coverage or random deaths (Alopecia versus thinning).

Also surely the actual number of trees is almost irrelevant - the important factors are: carbon capture per acre per year, and risks of carbon release (fire, conversion back to farmland, milling etc).