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| thanks for the suggestions Matt.
we use potassium sulfate as our main source of K other than manure and have > 5% OM so i would be very surprised if S is deficient.
I suppose Mo could be an issue but our pHs are 6.5-7 so it doesn't seem likely.
In soils with marginal S levels, a low rate of ammonium sulfate (as used by Ed. Winkle if I am remembering correctly) could make a big difference in the growth of radishes or other brassicas.
Added S might also increase the biofumigation effects of brassicas.
Joel
WIU Agriculture | |
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Our tillage radish crop so far
