How do I decrease pH (increase acidity) in high pH soils?
Soil pH can be lowered by applying elemental sulphur, aluminium sulphate or sulphuric acid but these methods have not been tested in WA and are unlikely to be economic for broad scale farming systems (as opposed to horticulture). In general, agriculture is an acidifying process through product removal and the use of some nitrogenous fertilisers, although the time scale over which alkaline soils are neutralised could be hundred of years.
