Diagnostics of nitrogen nutrition of winter barley crops using spectral analysis Galina Kozenkova, Natalia Shtyrkhunova, Marina Modina, Angeliea Voskanyan and Yulia Kuznentsova BIO Web Conf., 103 (2024) 00050 Published online: 17 April 2024 DOI: 10.1051/bioconf/202410300050