But how fast do they pull carbon from the atmosphere over that time?

If you take some fast growing trees, harvest them just as the curve starts to slow, put that wood to use somewhere it won't rot, and plant new trees that also fast grow - seems like you'd pull out more in aggregate?

Personally I'm more of a fan of the geo-weathering type sequestration plans, but if if we have a target, might as well optimize for it?