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Distribution of Phosphorus Fractions down the Soil Depth in the Savanna Zone of Nigeria

Author

Listed:
  • A. O. Ojo
  • V. O. Aduramigba-Modupe
  • O. D. Adeoyolanu
  • O. A. Denton
  • A. O. Oyedele
  • A. O. Tayo-Aruna
  • I. O. Fademi

Abstract

The distribution of phosphorus (P) fractions down the soil depth varies depending on the soil type as being affected by the surrounding soil management practices. A 10 km by 10 km site was chosen in the savanna zone of Nigeria for the study. Modal soil profile pits were dug to identify the different soil types while soil sampling was done at 0-20 cm, 20-40 cm, 40-80 cm and 80-120 cm depth. Resin P was the largest extractable P fraction while residual P was the least in the soil series characterized, down the soil depth. Fractionation results showed that there was variation down the soil depth. The conc. HCl-Pi was not observed at the 0-20 cm depth, NaHCO3-Pi and Po was small while NaOH-Pi and Po was observed at this depth. Initial decrease at the 20-40 cm depth was observed for most of the P fractions while more of the P fractions were observed at the 40-80 cm depth. The values observed at the 80-120 cm depth was however small compared to other soil depth. Resin P was the sink of P and would serve as a reserve of P in the soil series. However, organic and inorganic P extractable with NaOH i.e. NaOH Pi and Po which were high at the 0-20 cm depth would be mainly responsible for the availability of P in the soil solution for plant uptake.

Suggested Citation

  • A. O. Ojo & V. O. Aduramigba-Modupe & O. D. Adeoyolanu & O. A. Denton & A. O. Oyedele & A. O. Tayo-Aruna & I. O. Fademi, 2017. "Distribution of Phosphorus Fractions down the Soil Depth in the Savanna Zone of Nigeria," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 9(9), pages 1-94, August.
  • Handle: RePEc:ibn:jasjnl:v:9:y:2017:i:9:p:94
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    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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