Low phosphate (P) availability is one of the major problems in most Ferralsols from Angola, due to
the strong ability of these soils to adsorb P, thereby limiting its bioavailability for crop production
(Ucuassapi, 2006). Application of biochar as soil amendment, along with superphosphate and rock
phosphate fertilizers may be useful in increasing supply of available P. However, appropriate P
management strategies may require information on the fate of biochar and applied P fertilizers in the
soil as well as on their interaction with soil colloidal constituents. Therefore, information on soil P
availability using different methods, and P forms (inorganic and organic) by Hedley modified
fractionation procedure (Tiessen and Moir, 1993), early plant growth performance and P content in
plant after biochar amendment along with different rates of P fertilizers, is crucial for making
appropriate fertilizer and biochar recommendations for crops
