WASET
    F. Z. Aliyat and  B. Ben Messaoud and  L. Nassiri and  E. Bouiamrine and  J. Ibijbijen,  Assessment of the Biological Nitrogen Fixation in Soybean Sown in Different Types of Moroccan Soils.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2018, vol. 143(11). 719 - 722
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10009807.