Soil chemical property variation across individuals and genotypes.

<p>Boxplots showing pH, nutrient concentrations, and C:N in soils sampled at each of eight focal trees belonging to four different <i>Populus trichocarpa</i> genotypes (delineated with shading). The two replicates of each genotype (BESC 24, BESC 371, BESC 375, BESC 394) are indicated with the suffix A and B along the x-axis. Boxes represent three observations per individual. Units for carbon (C) and nitrogen (N) are percent by mass. Soil pH (pH) and soil C-to-N ratio (CN) are unitless and the remaining nutrients are expressed in mg kg<sup>-1</sup>.</p> <p>(DOCX)</p>