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Interactions between biostimulants and experimental years for root yield (a), sugar content (b), polarized sugar yield (c), white sugar content (d), white sugar yield (e), sodium content (f), potassium content (g) and α-aminonitrogen content (h). B0—control; B1—humic acids, essential amino acids; B2—essential amino acids biopolymers, soil bacteria; B3—humic acids, essential amino acids biopolymers, soil bacteria Figure was obtained at a level of significance α = 0.05.
