Abstract
The effects of interaction of compost tea with chelated EDTA or humic acid micronutrients on black cumin productivity were investigated. It showed that soil drenching or foliar spray of compost tea with chelated EDTA and humic acid micronutrients increased plant height, plant dry weight, weight of seeds, oil percentage and volatile oils of seeds. Interacted compost tea significantly (p 0.05) in the two seasons, for plant dry weight, weight of seeds and oil percentage. However it was significant (p < 0.05) with humic form in the second season for plant height and in the first season for volatile oils percentage. Compost tea when applying in conjunction with mineral fertilizers results in high performance in the availability, uptake and accumulation of nutrient elements and leading to increasing in black cumin productivity.
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