At the end of this section, you should know: 1. How lime neutralizes aluminum. 2. How soil acidity problems are diagnosed. 3. How the lime requirement is determined.
A major reason for crop response to lime is due to the precipitation of exchangeable Al
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VERY IMPORTANT! The beneficial effects of liming on crop growth are often related to neutralization of Al and not directly to the change in pH.
Responses of Corn and soybeans to liming on mineral soils
pH % Al Saturation Yield Corn Soybeans bu/a 5.0 77 127 18 5.5 25 143 40 6.0 15 143 40
Diagnosis of Soil Acidity Problems and Determination of the Lime Requirement
