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Rolla, ND | A lot of it has to do with weather.
Since sulfur is water soluble, a soil test can show plenty and then the rain moves it. For some reason we tend to just think the crop needs so many lbs, they are in the soil someplace so it should be fine, but if it doesn't extract it when it needs it, you can be in trouble.
Plus cool wet weather means poor uptake, and so deficiency can develop just because the crop isn't using much water. See it all the time here on canola, even with added sulfur.
Sunshine corrects as many sulfur deficiencies as anything. But some spots can be so deficient, that sunshine isn't enough. With the heavy rains in a lot of places, I'd expect deficencies at least until the organic material gets to break down a bit to release more. | |
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Sulfur deficiency in corn on corn
