MODELING OF SULFUR OXIDATION FROM ELEMENTAL SULFUR

An elemental S oxidation model has been developed which combines a max imum S release rate with modifiers for temperature and soil moisture c onditions. This model has been combined with a pasture growth and CNSP nutrient cycling model to match S oxidation rate to pasture S demand. In two Southern Australian enviroments, 100 mu m elemental S was supe rior to 200 mu m particles whilst in Northern Australia the 200 mu m p articles were superior. These models can be used to match S release to plant demand.