The effect of crude oil polluted soil and amelioration treatments using green manure (Calopogonium mucunoides Desvaux and Aspilia africana (Persoon) C. D. Adams) on the growth, heavy metal content, proximate composition, mineral content, vitamin A and C content and phytochemical constituents of Curcubita maxima was studied. Polluted soils were obtained by mixing thoroughly 4 kg of sandy-loam with 10, 20, 30, 40 and 50 ml of crude oil. Unpolluted garden soil served as control. The amelioration treatment... Mehr