Calculate the rate of percolation by using the following formula:
percolation rate (mL/min) = amount of water (mL) / percolation time (min)
For example,
suppose that for a certain sample, it took 20 minutes for 200 mL to percolate. So,
rate of percolation = 200 mL/ 20 min= 10 mL/min
Calculate the rate of percolation in your soil sample. Compare your findings with others and arrange the soil samples in the increasing order of the rate of percolation.