Phosphorus sorption characteristics of some soils of the rubber belt of Nigeria

Autor: V. E. Osodeke, Damian O. Asawalam, O. J. Kamalu, IK Ugwa
Rok vydání: 1993
Předmět:
Zdroj: Communications in Soil Science and Plant Analysis. 24:1733-1743
ISSN: 1532-2416
0010-3624
Popis: The phosphorus‐sorption capacity of 30 soils from the Rubber Belt of Nigeria were evaluated. The method used involved equilibrating 3 g soil in 30 mL 0.01 M CaCl2 containing various levels of phosphorus (P) at room temperature. From the P‐isotherm curve, the standard P‐requirement (SPR) of the soil was determined. The values vary from low to medium and range from 10.5 μg/g soil to 153 μg/g soil. The langmuir equation was applied to the data from which the P‐adsorption maximum was calculated. The values were fairly high and range from 125 μg/g soil to 750 μg/g soil. The standard P‐requirement correlated significantly with the oxides of iron (Fe) and aluminum (Al), organic carbon, and clay content, while the adsorption capacity correlated significantly with the oxides of Fe and Al.
Databáze: OpenAIRE