Roacho-Cortés E, Castellanos-Ramos JZ, Etchevers-Barra JD. Field diagnostic techniques to determine nitrogen in maize. Terra Latinoam [Internet]. 2021 Apr. 23 [cited 2024 Jul. 16];39. Available from: https://terralatinoamericana.org.mx/index.php/terra/article/view/820