Saad M. Howladar and Mostafa M. Rady and Ashraf Sh. Osman, Effect of Bio-Nitrogen as a Partial Alternative to Mineral-Nitrogen Fertiliser on Growth, Nitrate and Nitrite Contents, and Yield Quality in Brassica oleracea L.. journal = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology. July 2013, vol. 79(7). 578 - 583 [viewed 23 September 2024]. Available from: https://publications.waset.org/pdf/16334.