Assessment of organic phosphorus sources

The first main aim was to assess the forms of P in a variety of livestock manures collected in eastern Australia. The second main aim was to determine the crop responses to increasing rates of fertiliser P supplied as either CM or MAP under field conditions. The third main aim was to assess the fate of fertiliser P in soil supplied as either CM or MAP. The fourth main aim was to determine the crop recovery of a ‘fresh’ addition of MAP in the year of application to soils that had been previously fertilised with either CM or MAP under field conditions. Lastly, a brief economic assessment was carried out on CM and MAP as a source of P to crops.