@article{article9153c238,
title   = {Efficiency of nitrogen fertilization on citrus orchards},
author = {Boaretto, Antonio Enedi and Ueta, F.Z and Trivelin, Paulo Cesar Ocheuze and Muraoko, D and Mattos Junior, Dirceu},
year = {2006},
journal   = {Acta Horticulturae}
}