Contains phosphate, sulphate and lime making it a good choice as a maintenance fertiliser that will also raises soil pH

Will not cause germination injury and is safe to drill directly with seed

The form of P in dicalcic has been reverted so takes longer to become fully plant available in the soil compared with superphosphate

Due to the slower release nature of the phosphate in dicalcic trial work has shown this fertiliser can be of benefit in high leaching environments such as on West Coast sands and podzols and the Wharekohe soils of Northland.

​Uses

Ravensdown Dicalcic Phosphate is commonly used for direct drilling; dicalcic alone will not cause germination injury at normal rates of application. It can also be used for maintenance as it contains phosphate and sulphate and will also raise soil pH.

The phosphate in dicalcic has been reverted from monocalcium phosphate to dicalcium phosphate. This takes longer to become fully plant available and can provide a slower, continuous release than superphosphate.

Application rates and advice

Actual spreading rates will vary according to farm type, climate, productivity and soil type. Soil testing and fertiliser plans are available to ensure you use the right product at the correct rate. Call our Customer Centre for information.

Mixes well with most other products such as potash, but not with urea and other N fertiliser as for superphosphate.

As with most solid fertilisers, Dicalcic Super can be stored over a season as long as it is kept in a cool, dry, well ventilated area.