Fig. 2

Scanning electron microscopy (SEM) micrographs of studied phosphorus sources at a magnification of X1000: bone char (BC), bone ash (BA), phosphate rock (PR) and single superphosphate (SSP).
Scanning electron microscopy (SEM) micrographs of studied phosphorus sources at a magnification of X1000: bone char (BC), bone ash (BA), phosphate rock (PR) and single superphosphate (SSP).