Long-term residual value of North Carolina and Queensland rock phosphates compared with triple superphosphate

@article{Bolland2004LongtermRV,
  title={Long-term residual value of North Carolina and Queensland rock phosphates compared with triple superphosphate},
  author={M. D. A. Bolland and Robert J. Gilkes},
  journal={Fertilizer research},
  year={2004},
  volume={41},
  pages={151-158}
}
The effectiveness of large single applications of North Carolina reactive rock phosphate, Queensland non-reactive rock phosphate, and Calciphos, were compared to the effectiveness of superphosphate in field experiments in south-western Australia for up to 11 years after application. As measured using plant yield, superphosphate was the most effective fertilizer in the year of application, and relative to freshly-applied superphosphate, the effectiveness of the superphosphate residues declined… CONTINUE READING

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