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The Cr concentration (a), pH (b), LCr (c), LCr6+ (d), LRCr (e) and PCr6+ (f) of soil profiles that obey binomial distribution changes with depth in the chromate production sites (CPS). Solid Circle: soil profiles obey a Positive Binomial Distribution (n = 29); Open Circle: soil profiles obey a Negative Binomial Distribution (n = 22).
