Fig. 3. Interpolated quartile maps of (a) electrical conductivity of a 1:5 soil/water extract, and 
15N values of (b) the plant tissue, (c) the light fraction of soil organic matter, and (d) total soil organic matter.
Fig. 3. Interpolated quartile maps of (a) electrical conductivity of a 1:5 soil/water extract, and 15N values of (b) the plant tissue, (c) the light fraction of soil organic matter, and (d) total soil organic matter.