Figure 4 | Scientific Reports

Figure 4

From: Combined bio-chemical fertilizers ameliorate agro-biochemical attributes of black cumin (Nigella sativa L.)

Figure 4

Means comparison for Essential oil percentage and Harvest index per ha of Nigella sativa L. as influenced by biofertilizers and urea. Dissimilar letters show significant differences at the p < 0.01 level. Control (C), U Chemical urea, Nb (biological N), Pb (biological P), Kb (biological K, NPKb (mixed biological NPK), Nb + U50%, Pb + U50%, Kb + U50%, and NPKb + U50%.

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