Offor, U.; Iyagba, A.; Onwugbuta-Enyi, J. BIOSTIMULATIVE EFFECTS OF WATER HYACINTH (EICHHORNIA CRASSIPES (MART.) SOLMS) MULCH ON THE GERMINATION OF OKRA (ABELMOCHUS ESCULENTUS (L.)MOENCH) GROWN IN A CRUDE OIL CONTAMINATED SOIL. ESJ 2013, 9.