PHOTOPERIODIC REACTION AND RELATIONSHIP WITH ENVIRONMENTAL FACTORS OF BARLEY Journal title: International scientific journal Science and Innovation Authors: J.B.Khudaykulov, Z.Sh.Shavkatova Subject(s): Archaeology, Arts and Literature, Biological Sciences, Chemistry, Computer and Information Science, Economics, Education, Humanities, Law, Linguistics, Mathematics, Medicine, Philosophy, Physics, Psychology, Social Sciences, Architecture, Agricultural Science