Environmentally Friendly Nitrogen Fertilizers Appplication for Winter Cereals Considering the Mineral Nitrogen Content in Soil. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 1, p. 284–287, 2006. DOI: 10.17770/etr2003vol1.2019. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3530.. Acesso em: 11 mar. 2026.