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Northern Nebraska | Yes. 30 days after.
My clays trap potassium. So my best chance of getting it into my plants is once it's in soil solution. Hopefully once it's been in the plant it comes into an organic form and won't be bound between my clay never to be seen again.
Some 2:1 clays release potassium upon wetting the ones in Nebraska seem to hold them forever.
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AMS on soybeans
