TY - SER AU - Al-Sherif,E. AU - Hegazy,A.K. AU - Goma,N.H. AU - Hassan,M.O. TI - Allelopathic effect of black mustard tissues and root exudates on some crops and weeds KW - MOSTARDA KW - ÁCIDO FENÓLICO KW - ESTUFA KW - ALELOPATIA KW - EXTRATO VEGETAL ER -