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Fig. 5. Effect of seven clippings of P. smithii and M. sativa on soil saturation and oxalate-extractable Se in shale/soil mixtures with or without plants. Symbols for the planted treatments represent the means from 8 pots ± standard errors. Symbols for the unplanted treatments represent the means from 2 pots ± standard errors. Linear regressions at P
0.10 are provided in the legends.
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