Ecological role of crop rotation in the efficient use of agricultural territories of the forest-steppe zone of the Volga regionAlexander Toigildin, Vladimir Morozov, Mikhail Podsevalov, Irina Toigildina and Denis AyupovE3S Web Conf., 208 (2020) 01014DOI: https://doi.org/10.1051/e3sconf/202020801014