Evaluation of the influence of sowing time on yield and quality of the wheat grain using Multivariate dispersion analysisA. F. Melnik, V. G. Shumetov, B. S. Kondrashin and M. R. MikhaylovE3S Web Conf., 254 (2021) 07006DOI: https://doi.org/10.1051/e3sconf/202125407006