Loadings for the first three axes of principal components analysis (PCA) and the mean and range of the soil variables in 20 m×20 m data set.

Soil variables include Mehlich-3 extractable elements, potassium chloride extractable inorganic nitrogen, nitrogen mineralization rates, pH, slope and elevation. All elements are expressed as mg element kg−1 dry soil. Nitrogen mineralization rates are expressed as mg N mineralized kg−1 soil per 28 days. Percent variance for each axis is included.