Farmers’ perceptions of climate change and its implication on livestock production in mixed-farming system areas of Bale highlands, Southeast Ethiopia; Challenges and extents of Soil and Water Conservation measures in Guba-Lafto Woreda of North Wollo, Ethiopia; Evaluation of milk production performance of lactating Fogera cows fed with urea and effective micro-organisms treated rice straw as basal diet.

E3 Journal of Agricultural Research and Development

E3 Journal of Agricultural Research and Development Vol. 2 (2) pp. 053-059, May 2012; © E3 Journals; ISSN 2276-9897

Evaluation of Rock Phosphate-Phosphorus Sorption and Release in Basement Complex Soil Cultivated to the Oil Palm

E. G. Uwumarongie-Ilori1 * , P. O. Oviasogie1 , A. E. Aghimien1
1 Nigerian Institute for Oil Palm Research, NIFOR, P.M.B, 1030, Benin City
*Corresponding Author E-mail:
Accepted 3 March 2012


In this study, a laboratory experiment was conducted to estimate the amount of P released/sorbed in soil supporting oil palm by varying moisture content of soil, amount of phosphate rock (PR) added to soil and time of equilibration. Soils from the NIFOR experimental station, Onishere, Ondo State were used for the study. Mean values of 2.27, 0.95, 0.58 and 0.47mg/kg, 1.38, 1.47, 1.25 and 1.51mg/kg and 1.54, 1.55, 1.51 and 1.23mg/kg P were obtained for 1:2, 1:3, 1:4, 1:5 and 15, 30 and 60mins equilibration time respectively used for the study. Statistical analysis showed significant difference in P released from phosphate rock with time and moisture content. The results showed that increase in time of equilibration and low level of moisture content favoured release of water extractable P. The use of PR as P fertilizer is therefore site specific as soils tend to have different properties

Keywords: Phosphate Rock, Release, Sorbed

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