Silva, F.L.I.M. da, Rossiello, R.O.P. and Fernandes, M.S. (2014) “Ammonium-N nutrition, with and without N-Serve: its effects on the growth of corn roots”, Pesquisa Agropecuaria Brasileira, 22(6), pp. 567–574. doi:10.1590/S1678-3921.pab1987.v22.14391.