Thekla McDaniels wrote:How deep is your trench?
Is the calcium a solid sheet, or in fragments? Any indication how thick that layer is? If it is solid, I would be tempted to try to drill holes in it, unless it’s bedrock! “Starter cracks” would allow acidic compounds to dissolve it and deepen the topsoil, allow the fungi to mine it for plant needs.
I find it so exciting when something unusual or unexpected occurs or is discovered! I am filled with ideas & theories and possibilities. The potential at the start is pure joy to me!