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A comment on What elements does a plant need to grow?. Parent comment

Re:What elements does a plant need to grow? by pjc50 on Wednesday November 17, 2021 @05:33AM (#29251222)
An obvious question would be selenium; RDA is about 50 micrograms, and the upper "safe limit" is 400 micrograms. https://www.webmd.com/a-to-z-guides/supplement-guide-seleniu...

That's an extremely trace mineral.

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