@article{article71fa778a,
title   = {Soil nitrogen availability indices as predictors of sugarcane nitrogen requirements},
author = {Mariano, Eduardo and Otto, Rafael and Montezano, Zaqueu F and Cantarella, Heitor and Trivelin, Paulo Cesar Ocheuze},
year = {2017},
doi = {10.1016/j.eja.2017.06.004},
journal   = {European Journal of Agronomy}
}