Correction to “The Stonesphere in Agricultural Soils: A Microhabitat Associated With Rock Fragments Bridging Rock and Soil”

The caption for Figure 2 is incorrect.The correct caption for Figure 2 is: Relationships between chemical weathering and element mobility, OM accumulation and the production of noncrystalline Fe-(hydr)oxides pointing towards the evolution of a microhabitat in weathered rocks and soils.(a) Physical accumulation of heavy minerals and element depletion through chemical weathering as indicated by Zr concentrations and Ba:Nb ratios.(b) Fe o concentrations and 13 C values indicate an enrichment in noncrystalline Fe-(hydr)oxides with increasing OM content.Typical 13 C ranges for CaCO 3 and OM-sourced carbon (C3 plants) are inserted (Hoefs 2009).Variations in 13 C and mass transfer coefficients ( Zr ) depict the fractional loss of Fe (c) and Si (d) with increasing OM content and turnover rates.We apologize for this error.