Abstract
Abstract The rhizosphere is the interface between plant root and soil. A major justification for studying rhizosphere microorganisms must be their influence on plants. Microorganisms in the rhizosphere soil and rhizoplane can affect plant growth either beneficially or adversely (Rovira 1965). Furthermore, as plant roots exude raw materials that feed the microbes in the rhizosphere, the microbial activity differs quantitatively and qualitatively from that in the soil beyond the influence of the root (Curl and Truelove 1986).
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