BERZINS, P.; RANCANE, S.; SVARTA, A. The Productive Longevity Of Perennial Grasses Swards Depending On The Npk Fertilizer Rates. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 2, p. 244–251, 2015. DOI: 10.17770/etr2011vol2.967. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/967.. Acesso em: 27 apr. 2024.