Calibration of available P in soils from derived savannah zone of western Nigeria

@article{Ayodele2005CalibrationOA,
  title={Calibration of available P in soils from derived savannah zone of western Nigeria},
  author={Olufemi Ayodele and Akinola Agboola},
  journal={Fertilizer research},
  year={2005},
  volume={6},
  pages={121-129}
}
Extractants for determining soil available P are useful in fertilizer recommendations when calibrated with actual yield responses. The relationships between relative (or percent) yield and soil P test levels can be described using various mathematical models, and the relevant critical P levels estimated. Critical P values for 60 cultivated savannah surface… CONTINUE READING