“…The effects of lime, management system/land use practices, and organic residue addition on Al KCl levels have been widely evaluated (Brunetto et al, 2012;Barcellos, Motta, Pauletti, Silva, & Barbosa, 2015;Costa, Crusciol, Ferrari Neto, & Castro, 2016;Baquy, Li, Xu, Mehmood, & Xu, 2017;Barbosa et al, 2017b;Machado, Camara, Sampaio, Pereira, & Ferraz, 2017;Rocha et al, 2017). These data were obtained from the most superficial soil layers, excluding less weathered deep horizons with organic matter contents close to zero.…”