Growth and development of Alfalfa depending on the type of nitrogen nutrition Marina Yu. Kozyreva, Larisa Zh. Basieva, Al-Azawi Nagham Majeed Hameed, Alda Kh. Chibirova and Khetag M. Khetagurov BIO Web Conf., 23 (2020) 03007 Published online: 14 August 2020 DOI: 10.1051/bioconf/20202303007