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Dep. of Botany, Panjab Univ., Chandigarh 160014, India
Corresponding author (allelopathy{at}satyam.net.in)
To exert phytotoxic effects on other plant species, chemicals may have to move to the roots of the target plant through the soil. However, during movement, abiotic (physical and chemical) and biotic (microbial) soil barriers can limit the phytotoxicity of chemicals in terms of quality and quantity required to cause injury. Organic matter, reactive mineral surfaces, ion exchange capacity, inorganic ions, and abiotic and biotic factors of soil environment significantly influence allelochemical activity. In this article, the significance of soil in laboratory and field studies on allelochemical interference is discussed.
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