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The study was conducted at the Crops Research Station, College of Agriculture, University of Diyala during the years 2017-2018 to evaluate the effect of planting dates and spraying of humic acid in the growth characteristics and active compounds of Fenugreek ( Trigonella foenum –graecum  L). The experiment was carried out according to factorial arrangement in a complete randomized blocks design (RCBD) with three replicates and two factors, the first include planting dates (15/10,1/11,15/11) and the second is spraying of the humic acid at a concentration of 2 and 4 ml / L −1 . Results revealed that the planting dates had a significant effect in the studied traits, the first date (15/10) recorded the highest rate of plant height (84.89 cm), seeds yield (7.805 g / plant −1  ), seeds yield / hectare (770.2 kg / h −1 ), number of branches (9.67 branches / Plant −1 ), number of leaves (146.6 leaves / plant −1 ), dry plant weight (20.11 g/plant −1 ), number of pods (47.33 pods / plant −1 ), number of seeds (14.44 seeds / pod −1 ), weight of 100 seeds (1.502 g) and the active compounds such as Choline (170.99 mg/ml −1 ), Trigonelline (305.73 mg/ml −1 ), Carpine (95.89 mg/ml −1 ) and Gentianine (191.11 mg/ml −1 ). The spraying of humic acid at a concentration of 4 ml / L was superior significantly in all traits such as plant height (74.67 cm), seeds yield (7.220 g / plant −1 ), seeds yield / hectare (710.0 kg / h −1 ), number of branches (8.11 branches / plant −1 ), number of leaves (61.00 leaves / plant −1 ), dry plant weight (20.44 g/plant −1 ), number of pods (38.22 pods / plant −1 ), number of seeds (14.00 seeds / pod −1 ), Choline (163.61 mg/ml −1 ), Trigonelline (283.86 mg/ml −1 ), Carpine (83.92 mg/ml −1 ) and Gentianine (183.03 mg/ml −1 ).

Effect of planting date and spraying of humic acid in the growth traits and active compounds of Fenugreek (Trigonella foenum – graecum L)