“Field Performance of Three Rapeseed Genotypes (Brassica Napus L.) Under Different Levels of Plant Density in Nineveh Governorate”. College of Basic Education Research Journal 17, no. 2 (July 1, 2021): 1670–1683. Accessed July 11, 2026. https://berj.uomosul.edu.iq/index.php/berj/article/view/38879.