Salicylic acid and abiotic stress influence allelochemicals and inhibitory potential of root exudates of two rice(Oryza sativa) cultivars against Barnyardgrass (Echinochloa crus-galli L.) Journal title: International Journal of Farming and Allied Sciences Authors: Azar Zeinali, Mohammadali Esmaeili, Ayoub Heidarzade Subject(s): Agricultural Science, Biochemistry, Plant Sciences, Soil Sciences, Zoology and Animal Science, Agricultural Economics