Peruzzo, Geraldino, Otávio joão F. de Siqueira, and Sírio Wietholter. “Agronomic Efficiency of Nitrogen Fertilizers for Wheat”. Pesquisa Agropecuaria Brasileira 29, no. 7 (July 1, 1994): 1027–1034. Accessed March 26, 2026. https://apct.sede.embrapa.br/pab/article/view/4144.