efficiencies indicate that bioretention columns export nitrates and TKN
from the system. Because of large amounts of nitrates in the Royal Classics
compost, this bioretention system released more nitrates than the
Silver Springs compost, and at a faster removal rate in the first two
storms. The Silver Springs bioretention system released nitrates more
gradually than Royal Classics (at storms 3–6); suggesting that nitrification
occurred during the experiment