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...s (at the same time) from each of the sites. I used each of the replicates in a treatment. There were 4 treatments. 2 were controls and the other two were a simulated 30 day drought and a simulated 60 day drought. >From each of the replicates in each of the treatments I measured pH and nitrate, sulphate, dissolved organic carbon, calcium, magnesium, nickel, cobalt, aluminum, and copper concentrations. I tried performing an NMDS using the following tutorial http://strata.uga.edu/software/pdf/mdsTutorial.pdf. However, I did not take into account sites or treatments. All the data was used without ma...