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W.C. Mo. | This problem is showing up a lot in our area. Usually next to gravel roads. The rock they use is a dolomite limestone which is high in magnesium. The road dust filters next to the road causing HIGH mag levels which tend to tie up K. Here I have been adding a couple gallons of 3-18-18 when I post spray and the yellow disappears in a few of days.
Edit: be careful what type of lime you apply. If it is high mag levels causing your def and you add dolomite limestone, you may be adding to your problems. High mag levels can show a neutral Ph but still be deficient in calcium.
Edited by greasegun 7/21/2011 17:01
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K deficient soybeans? or lime...
