For citations:
Repka D.A., Beltyukov L.P., Gordeeva Yu.V. The efect of bio products and fertilizers on yield structure elements and productivity of winter wheat varieties grown in the Don area. Grain Economy of Russia. 2020;(2):72-76. (In Russ.) https://doi.org/10.31367/2079-8725-2020-68-2-72-76