[xingyzt]

Newer studies have put doubt to olivine's effectiveness: https://www.technologyreview.com/2022/03/30/1048434/why-usin...

[pfdietz]

That was about putting olivine in seawater, not spreading it on soil.

My concern with all these approaches is the nickel content of olivine, which can be several tenths of a percent.

[ncmncm]

Yes, you would favor using the low-nickel supply on farmland.

I wonder if nickel in olivine would be harmful on beaches.