“…With the use of isotopes, interplant transfer of various macro-and micro-elements essential for plants, such as nitrogen, phosphorus, and carbon has been reported to follow concentration gradients through shared mycorrhizal fungi, root exudates or through root decomposition (Fitter et al, 1998;Graves et al, 1997;Jones et al, 2009;Kravchenko et al, 2021;Ren et al, 2013;Robinson & Fitter, 1999). Interplant nutrient transfer has been mainly studied in agroecosystems (Chalk & Smith, 1997;Jalonen et al, 2009;Pirhofer-Walzl et al, 2012;Sierra et al, 2007;Sierra & Nygren, 2006), and in the case of nitrogen (N), frequently from a leguminous to nonleguminous species, since this combination maximizes the differences in N concentration between the donor and recipient plants (Chalk & Smith, 1997;Jalonen et al, 2009;Oliveira et al, 2021;Pirhofer-Walzl et al, 2012;Thilakarathna et al, 2016). In some cases, the N transferred from the legume can account for up to 20% of the total nitrogen of its neighbouring plant (Peoples et al, 2015).…”