Maļceva, Marija, Māra Vikmane, Veneranda Stramkale, and Aldis Stramkalis. “EFFICIENCY OF NITROGEN FERTILIZER APPLICATION ON WHITE CABBAGE”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 3, 2015): 125–132. Accessed May 3, 2024. https://journals.rta.lv/index.php/ETR/article/view/1106.