Al-Nomir ع. ع., Alhadi ع. م., Manea م., Alsaiadi م. م., Hadi ع. م., and Al-Hamaty س. ع., “The effect of different phosphors fertilizer levels on productivity and characteristics of Alfalfa forage (Medicago sativa L.)”, Univ. Aden J. Nat. and Appl. Sc., vol. 22, no. 2, pp. 285–294, Oct. 2018.