Carbon Sequestration from Biosolids

We've used biosolids for years to reclaim lands, like mines, as fertilizer and it's helped to reduce chemical fertilizer consumption, water runoff, but now there's some studies that are going to look into can we actually sequester carbon with biosolids.
Currently, there's agricultural experts looking at soil carbon sequestration. What they're trying to figure out is can we sequester carbon from biosolids?