Technology for the production of bionutrients based on a combination of activated coprolites and silatranes and evaluation of their effectiveness in the fieldYuri Shirokov, Natalia Mochunova, Dmitry Ponizovkin, Valery Tikhnenko and Sergey FilippovE3S Web of Conf., 458 (2023) 02012DOI: https://doi.org/10.1051/e3sconf/202345802012