@article{articleda3b5be0,
title   = {Urease inhibitor NBPT on ammonia volatilization and crop productivity: a meta-analysis},
author = {Silva, Aijânio Gomes de Brito and Sequeira, Cleiton H and Sermarini, Renata Alcarde and Otto, Rafael},
year = {2017},
doi = {10.2134/agronj2016.04.0200},
journal   = {Agronomy Journal}
}