TIMBARE, R.; BUŠMANIS, M. Environmentally Friendly Nitrogen Fertilizers Appplication for Winter Cereals Considering the Mineral Nitrogen Content in Soil. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 284–287, 2006. DOI: 10.17770/etr2003vol1.2019. Disponível em: https://journals23.rta.lv/index.php/ETR/article/view/2019.. Acesso em: 23 nov. 2024.