Impact of nitrogen fertilizers on protein and amylose content in grain of rice varieties grown in different agrolandscapes of Krasnodar regionNatalia Tumanian, Tatyana Kumejko, Svetlana Chizhikova, Elina Papulova and Sergey GarkushaE3S Web Conf., 175 (2020) 07009DOI: https://doi.org/10.1051/e3sconf/202017507009