1. PLANT GROWTH RESPONSE AND NITRATE REDUCTASE ACTIVITIES OF ROOTS OF CHROMOLAENA ODORATA IN A MODEL SPENT LUBRICATING OIL-POLLUTED SOIL . Authors: PASCAL C. OKOYE, RAPHAEL A. AIMIEBENOMOR, EHIMWENMA S. OMOREGIE, BECKLEY IKHAJIAGBE, GEOFFREY O. ANOLIEFO.