It was just to pull calcium from the soil matrix. A group of us had a zoom session with Pete Norwood he had a few papers re lacto bacillus calcium and mycorrhizae fungi. I’m short on time this link might be a good intro https://blog.nutri-tech.com.au/nutri-life-bam/

Otherwise jump on google scholar see what you can find lacto bacillus calcium availability or lacto bacillus increase mycorrhizae. I’ll quiz Pete about a link to those papers