hd 21,

depending on your soil type and the finess/coarseness of the lime.....lime can take time to work. Heavier soils will take more lime to correct 1 point changer in Ph, than say a sandy soil.

Also, the source of lime may be an issue, as different quarries have different RNV's (relative nutrient values) and CCE (calcium carbonate equivalents). Meaning a ton of lime from one quarry may affect your soil differently than a ton from a different quarry.

Give this link a good study: http://aglime.org/

While based on Indiana....not sure where you are from...it gives a lot of information which is universal.

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(Lime effectiveness.png)

Lime correction factor.png (66KB - 763 downloads)

Lime effectiveness.png (65KB - 740 downloads)