Bueno N, Haag H, Pereira J, Viégas I. Mineral nutrition of rubber plants: XI. Aluminum concentration in the substract affecting the composition of n, p, k in young rubber trees (Hevea sp.) . An. Esc. Super. Agr. Luiz de Queiroz. 1989;46(1):135-154. doi:10.1590/S0071-12761989000100010