x = Clay content in soil (in gram per g/kg)
y = Soil moisture at 10cm depth (in %)

Data taken from 150 forest plots. Plots with missing data were excluded.

The clay content in a soil is one determinant of how much water a soil can hold.

Reference:
Solly et al (2014). Factors controlling decomposition rates of fine root litter in temperate forests and grasslands. Plant and Soil, 382(1-2), 203-218.

x --> y
