New Phytologist 167 (2005), 523–530

Since its publication, the authors of West et al. (2005) have brought to our attention corrections that need to be made to their paper. In the Materials and Methods section, the first sentence of the subsection ‘δ15 N analyses’ should read ‘In June 2002, above-ground biomass of all legume species …’ and, thereafter, ‘leaf N’ should read ‘above-ground biomass N’.

We apologise to our readers for these mistakes.