Published in Scientific Papers. Series B, Horticulture, Vol. LXIV, Issue 1
Written by Todor BABRIKOV
During 2014-2015 the varieties of long-day onion (Allium cepa L.), sown in spring were examined at the experimental field of Department of Horticulture in Agricultural University, Plovdiv, Bulgaria. It has been estimated that the foliar treatment with liquid Humustim (23.4% humic acids) during the phase of luxuriant growth of vegetative organs of the onion plants contribute to overcome the negative factors of an environment. The treatments with Humustim gave the higher onion yield of 4% (by varieties Citation and Tamara) to 15.4% (Pueblo and Aspen).
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