TY  - JOUR
T1  - Fractional Recovery of Applied Phosphorus in Soils of Akwa Ibom State, Niger Delta Region of Nigeria
AU - , T.O. Ibia AU - , E.J. Udo AU - , J.A.I. Omueti 
JO  - Environmental Research Journal
VL  - 3
IS  - 1
SP  - 1
EP  - 3
PY  - 2009
DA  - 2001/08/19
SN  - 1994-5396
DO  - erj.2009.1.3
UR  - https://makhillpublications.co/view-article.php?doi=erj.2009.1.3
KW  - Fractional recovery
KW  -phosphorus fixing capacity
KW  -fertilizer factor
KW  -bray P-1
AB  - Seven surface soil samples, representing the dominant soil parent materials in Akwa Ibom State, Niger Delta Region of Nigeria were treated to various concentration levels of P and the amounts of P measured at time intervals of 1, 10, 50 and 150 days. The phosphorus fixing capacity of the soils increased with increasing rate of added P and time of equilibration. At 1 day, P fixation capacities estimated by fractional recovery varied from 26-66% and at 150 days observation it ranged from 37-76%, respectively for soils of sandstone and beach sands origin. The amount of P required to increase the value of Bray P-1 by 1 mg L<SUP>-1</SUP> (Fertilizer factor) at 150 days ranged from 2.6-5.3 mg L<SUP>-1</SUP> with a corresponding mean of 3.9 mg L<SUP>-1</SUP>. The fertilizer factor appears to provide a useful index of obtaining the P fertilizer needs of the soil, however, calibration and correlation studies in a wide range of soils could further the usefulness of this approach.
ER  -