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Coldwater, Michigan | There is no good way to tear the high pH down. Using NH3, or Ammonium Sulfate, for your corn acres could help overcome some of the effects of the high pH. It might help to know some of your micro nutrient levels. On corn, Zinc would be one and if the Mn is very low, it might help your corn also. With that high of pH you can almost bet the Mn will be short no matter what your Mn readings are for a soybean crop.
A company I worked for years ago became aware that one of their corn hybrids wasn't working well in the Thumb of Michigan where some of the soil pH's reach 8.0+/-. By switching the genetics in that maturity they came up with a hybrid that could be used in the Thumb and do very well yield wise. Those particular hybrids were in the 100 day range. So careful hybrid selection can help manage the Ph issue.
Something some of my growers are doing when the Muck (Organic) soils are in the low 6's and they have been spraying multiple times with MnSul, is to use AMS either just before the planter or right after planting. The idea being that AMS doesn't need to be incorporated to become part of the soil because it is very Hygroscopic and will take in the moisture it needs to go to work. Don't incorporate the AMS. This will help lower the Ph for a short period of time in the top couple inches of the soil. Normally we use 120-150# lbs per acre of the AMS.
Also remember some of the Herbicides are very sensitive to soil pH.
Just some ideas to consider if you have these very high pH levels.
Edited by Bill Moyer 11/26/2021 08:47
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