Soil analysis with a laboratory test is the best indication of the limestone requirements. The amount of limestone to apply will vary depending on initial soil pH and the type of crop grown. Soil characteristics must also be considered. Clay soils should be tested annually until they reach the target pH, and then limed every three years. Sandy soils need more frequent liming applications, using higher magnesium dolomitic limestone. Test sandy soils annually.
One acre will require approximately two tons of limestone every four to five years.
- As a source of calcium, incorporate 1 ton per acre
- To raise pH one unit, incorporate 1.2 to 2.3 tons per acre
- Soil texture
- Nitrogen fertilization rates
- Calcium and magnesium crop removal
- Amount of limestone applied
- Soil pH desired