Figure 4From: Denitrification from nitrogen-fixing biologically crusted soils in a cool desert environment, southeast Utah, USAComparison of N fixation and denitrification in light and dark biocrusts. Values are means ± 1 SE. Note that the y-axis is displayed on a log scale. A conversion factor of 0.295 was used to convert ethylene produced to N fixed.Back to article page