Dechen A, Haag H, Sarruge J, Oliveira G. Mineral nutrition of vegetable crops: XXXV. effects of calcium levels in nutrient solution upon the concentration of N, P, K, Ca, Mn and S in tomato plants (Lycopersicon esculentum Mill.) . An. Esc. Super. Agr. Luiz de Queiroz. 1980;37(2):1009-1057. doi:10.1590/S0071-12761980000200027