Context is everything. Example: I own land that's been degraded by a millennium of overgrazing; while in ancient times it surely was home to birch forest, today it's 50% poor grassland and 50% gravel barrens (well, and some iron bogs, but they're good and shall remain boggy). The canyon slopes are subject to landslides as a result of the degradation. Simple restoration of the soil by fertilizer (it's highly phosphorus and nitrogen deficient), manure, or seeding leguminous plants can
increase the amount of carbon in the soil (and overland) dramatically in 5-10 years or so - about 10t/ha aboveground and ~120t/ha underground to the gravel barrens, somewhat less for the poor grasslands. Reforestation (taiga species) would add another ~80t/ha aboveground and ~50t/ha underground over several decades. So long as the biome remains "forest", the carbon sequestered will not decline, as new trees replace ones that die - indeed, mature trees would continue to seed the barrens around them, expanding their groves and continuing to lock up more carbon. So long as grasslands are not allowed to become overgrazed again, their carbon, too, will remain locked up.
I have 8ha. That's a
lot of carbon sequestration potential just from restoration and reforestation - something like 2000t when all is said and done. Honestly, the only thing that stops me from doing more is how much money I have to sink into things like soil restoration or buying seedlings. Even the smallest conifer seedlings I can get are ~$2 each, which would mean tens of thousands of dollars in reforestation costs. If I want larger trees that get the job done sooner, they're even more expensive. I've already spent many hundreds of dollars on fertilizer, and probably need to spend thousands more to get phosphorus up to normal. And whether I do nitrogen from synthetic fertilizers, paying for dozens of manure spreader truckloads, or legume planting, that too will come with a significant price tag.
Or to put it another way... cash
does sequester carbon.
(On that note, if anyone wants to sequester some carbon, you're more than welcome to support restoration or reforestation plans on my land - I'd do all the grunt work, and send photos of your plants
Realistically, though, I expect this to just be a project that I slowly fund myself over the course of decades)