The Changes of Nutrient Content in Soil in Long-term Fertilizer Experiments. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 2, p. 329–332, 2015. DOI: 10.17770/etr2015vol2.624. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3963.. Acesso em: 11 mar. 2026.