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| CCE is a measurement of the Calcium Carbonate Equivalent of limestone. That is a calculation based upon the product you would use to raise soil pH. In this case kuch is looking to lower an alkaline soil, not raise an acid soil so CCE of a liming product would not matter.
Gypsum is pH neutral in almost all cases. It can help with soil tilth (I've never been able to explain why) and I cannot remember for certain, but I think it helps with sodic soils (high Sodium -Na) by removing the Na from the CEC and allowing it to be flushed from the soil.
Buckwheat and others do have good comments about the use of NH3 as your nitrogen source, AMS, and MAP as a P source. Those are all acidifying agents. Chances are though that your soil has so much free calcium carbonate (the parent material of your soil may be limestone) that you will never have any real great impact on the soil pH. Phosphorus is probably highly affected by the high pH. I have seen some positive results with a product called Avail on high pH soils in NC Iowa, but cannot be certain that would work on your soils. | |
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Anyone use gypson for high ph?
