Rock Phosphate and superphosphate as sources of phosphorus for subterranean clover on an acid sandy soil
Waite Agricultural Research Institute Glen Osmond, SA Trial location: Mount Compass (SA)- Randomised block with 4 replications
- RPR & SSP applied at 4 different rates
- P applied autumn of the first year only
- Dry matter yield measured Oct/Nov annually
- Soil P levels evaluated annually post-harvest
Summary of findings
RPR & SSP outperformed the control in all 3 years of trial.
RPR outperformed SSP in year 1 at application rate of 66kg/ha (other rates had similar results).
By year 3, RPR outperformed SSP at all application rates.