Production of anhydrous ammonia and aqua ammonia enriched in 15N from (15NH4)2SO4 . Scientia Agricola, [S. l.], v. 59, n. 3, p. 595–603, 2002. DOI: 10.1590/S0103-90162002000300028. Disponível em: https://www.revistas.usp.br/sa/article/view/21773.. Acesso em: 12 may. 2024.