Question: The article Organic Recycling for Soil Quality Conservation in a Sub-Tropical Plateau Region (K. Chakrabarti, B. Sarkar, et al., J. Agronomy and Crop Science, 2000:137142)

The article “Organic Recycling for Soil Quality Conservation in a Sub-Tropical Plateau Region” (K. Chakrabarti, B.

Sarkar, et al., J. Agronomy and Crop Science, 2000:137–142) reports an experiment in which soil specimens were treated with six different treatments, with two replicates per treatment, and the acid phosphate activity (in ????mol p-nitrophenol released per gram of oven-dry soil per hour) was recorded. An ANOVA table for a one-way ANOVA is presented in the following box.

One-way ANOVA: Treatments A, B, C, D, E, F Source DF SS MS F P Treatment 5 1.18547 0.23709 46.64 0.000 Error 6 0.03050 0.00508 Total 11 1.21597 The treatment means were Treatment AB C D E F Mean 0.99 1.99 1.405 1.63 1.395 1.22

a. Can you conclude that there are differences in acid phosphate activity among the treatments?

b. Use the Tukey–Kramer method to determine which pairs of treatment means, if any, are different at the 5% level.

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