Difference Between Gypsum and Lime - Knowledgebase Question

Ironwood, MI
Question by tdoman9
April 18, 2000
What is the difference between gypsum and lime?

Answer from NGA
April 18, 2000


Gypsum is calcium sulfate, and lime is calcium carbonate. Adding lime increases the pH of the soil. Gypsum is often used as a source of calcium on soils that wouldn't benefit from increasing the pH.

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