see also calcium carbonate`

will raise the soil pH; Fairly cheap to purchaser; Quick effect on soil.

Limitations: Careful calculation of application rate required so as not to under or over dose the soil.

Environmental: Implication of energy used in processing; Once applied, effect lasts for several years.

Health and Safety: Burning of eyes Or exposed skin, Should not breathe in dry powder.

Timing of application: Autumn – and allow to be washed into the soil; Must not come into contact with farmyard manures.

Effectiveness of the material: Very effective; You need to apply more carbonate to have the same effect as hydroxide.