Investigation of humatic acid on the short-day onion cultivars grown by drip irrigation system in the condition of South Bulgaria
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Author: Babrikov, Todor; Ovcharova, Antonia
The positive effect of humatic acid on the development of short-day onion cultivars was established. Highest influence of the treatment was in the cultivar, Swift. The yield form it was with 15,71%above the non-treatment variants.