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Table 9 Correlation table for fractions of P and some soil properties

From: Chemical forms of phosphorous and physicochemical properties of acid soils of Cheha and Dinsho districts, southern highlands of Ethiopia

  Clay pH exAc exAl OC M 3P Feox Alox Fed PSC DPS Pox CEC
NH4Cl − 0.87** 0.82** − 0.84** − 0.84** 0.89** 0.94** − 0.89** − 0.94** − 0.93** − 0.96** 0.94** 0.94** 0.82**
NaHCO3 pi − 0.85** 0.81** − 0.84** − 0.84** 0.88** 0.96** − 0.82** − 0.93** − 0.90** − 0.92** 0.91** 0.91** 0.80**
NaHCO3 Po − 0.89** 0.78** − 0.82** − 0.82** 0.85** 0.95** − 0.84** − 0.92** − 0.91** − 0.92** 0.92** 0.93 ** 0.89**
NaOH Pi 0.05 − 0.81** 0.89** 0.89 ** − 0.89** − 0.89** 0.64* 0.91** 0.86** 0.85** − 0.74** − 0.75** − 0.72**
NaOH po − 0.23 − 0.55 0.60 0.60 − 0.55 − 0.57 0.19 0.56 0.43 0.46 − 0.39 − 0.39 − 0.26
HCl p − 0.82** 0.81** − 0.87** − 0.87** 0.92** 0.97** − 0.77** − 0.96** − 0.92** − 0.93** 0.88** 0.89** 0.81**
  1. LR lime requirements, Mehl 3P Mehlich 3P, Bra P Bray 1 P, Ols P Olsen P, LR lime requirement, exAl exchangeable Al, exAc exchangeable Acidity, OC organic carbon, Alox, Feox, and Pox oxalate extractable Al, Fe, and P, respectively, PSC phosphorous sorption capacity, DPS degree of P saturation, Fed citrate dithionite bicarbonate extractable Fe
  2. *Significant at 0.05 and **Significant at 0.01 probability levels, respectively