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Little River, TX | If your pH is high because you have a calcareous soil with lots of free lime, adding more calcium will do nothing for you. It is difficult to massage down a pH when the soil test has tons/A of calcium, In that case tons of sulfur may work, but usually that is temporarily. I can drive down for my 8 pH to a 6.x range with 1,000 to 2,000 lbs of anhydrous, for a few months. My soil has literally tons of free lime per acre,
One thing to watch is the extractant the lab is using. With your pH's insist they use the Olsen chemistry, (Sodium Bicarbonate) Bray or Mehlich will not accurately indicate your phosphate needs.
The good thing is the tied up by calcium phosphate can eventually become available. This is telling us there is phosphate there that a soil test will not find. They are designed to tell us how much phosphate is readily available not what the total phosphate level is. Soil testing is a qualitative analysis not a quantitative analysis. | |
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Corn on high ph soil?????????
