The great plains in the US were legendary for having multiple feet of deep, rich topsoil for farming.

Rich topsoil is that which has lots of organic matter in it, i.e. carbon.

There are people who say the great plains were built by roaming buffalo herds, grazing on the grasses growing there.

So if that natural system was able to sequester carbon it stands to reason that humans could mimic it and in doing so also sequester carbon.