Extended Data Fig. 5: Chemical and physical properties of field soils.

The soil pH (a), content of sand (b), clay (c), silt (d), dissolved organic carbon (DOC, e), available nitrogen (N, f), potassium (K, g), phosphorous (P, h), copper (Cu, i), zinc (Zn, j), magnesium (Mg, k), manganese (Mn, l), iron (Fe, m), silicon (Si, n), molybdenum (Mo, o) and nickel (Ni, p) in field soils. Data are presented as mean + SEM. The exact number of biological replicates is indicated on each bar. Data points represent individual replicate samples. Raw data for this figure are provided in the Source Data. DW, dry weight.