Castro, G.S.A. and Crusciol, C.A.C. 2013. Yield and mineral nutrition of soybean, maize, and Congo signal grass as affected by limestone and slag. Pesquisa Agropecuaria Brasileira. 48, 6 (Sep. 2013), 673–681. DOI:https://doi.org/10.1590/S1678-3921.pab2013.v48.13754.