29 Example We glede A silty soil containing a 14% moisture was mixed in a large muller mixer with 10 weight percent of tracer consisting of dextrose and picric acid. After 3min of mixing, 12 random samples were taken from the mix and analyzed colorimeterically for tracer material. The measured concentration in the sample were in weight percent tracer: 10.24 9.20 11.08 9.30 7.94 10.76 10.97 10.03 10.24 10.55 11.91 9.72 Calculate the mixing index lp