The following metadata columns have been omitted because they didn't contain categorical data: average-soil-relative-humidity, average-soil-temperature, ec, elevation, percent-relative-humidity-soil-100, percentcover, ph, relative-humidity-soil-high, relative-humidity-soil-low, temperature-soil-high, temperature-soil-low, toc

The following categorical metadata columns have been omitted because the number of groups was equal to the number of samples, there was only a single group, or the column consisted only of missing data: Description