IKHAJIAGBE, B. ., G. O. ANOLIEFO, O. F. OLISE, F. . RACKELMANN, M. SOMMER, and I. J. ADEKUNLE. “Major Phosphorus in Soils Is Unavailable, Yet Critical for Plant Development”. Notulae Scientia Biologicae, vol. 12, no. 3, Sept. 2020, pp. 500-35, doi:10.15835/nsb12310672.