Lime sources

Dolomitic lime (usually marketed as dolomite)

Dolomitic lime in WA is mostly mined from old lake and inland drainage systems (Figure 5 and 6). Dolomitic lime has a higher proportion of magnesium carbonate than limesand or limestone. It was formed by the accumulation of calcium and magnesium carbonates dissolved from rock.

Figure 5 Dolomitic lime mine near Watheroo

Figure 6 Close-up of dolomitic lime from a pit near Watheroo

Other liming products

Other types of agricultural lime that may be used include Cretaceous chalk and lake bed marls. Industrial by-products from cement manufacture and lime kiln dust may be available.

As for all agricultural limes, the quality and value of these products should be assessed before use (see Lime quality).

Calcium oxide (burnt lime or quicklime) and calcium hydroxide (slaked or hydrated lime) are not recommended for use as agricultural lime. Storage and handling is difficult, they are caustic, so skin contact and inhalation need to be avoided and burnt lime reverts to calcium carbonate if stored exposed to air.