A 2014 on-farm research trial in Perry, Michigan, showed that foliar-applied manganese and sulfur were not effective in increasing nutrient uptake and soybean yield.
There is concern among soybean producers that manganese (Mn) and sulfur (S) deficiencies are causing yield reductions in Michigan. As such, there is a tendency among soybean producers to apply supplemental nutrient sources on most fields even without experimental evidence...
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