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Table 3 Effect of nicotinamide and/or humic acid on photosynthetic pigments (mg/g) of fresh faba bean leaf at 75 days after sowing

From: Enhancement quality and quantity of faba bean plants grown under sandy soil conditions by nicotinamide and/or humic acid application

Treatments Chlorophyll a Chlorophyll b Carotenoid Chlorophyll a + chlorophyll b Total photosynthetic pigments
Control 1.464 0.399 0. 062 1.863 1.925
Humic acid 5% 1.574 0.541 0.281 2.115 2.396
Nicotinamide 5 mg/L 1.702 0.878 0.207 2.580 2.787
Nicotinamide 10 mg/L 1.925 1.104 0.207 3.029 3.236
Nicotinamide 20 mg/L 1.838 1.339 0.168 3.177 3.345
Nicotinamide 5 mg/L + humic acid 5% 1.567 0.734 0.155 2.301 2.456
Nicotinamide 10 mg/L + humic acid 5% 2.167 1.668 0.270 3.835 4.105
Nicotinamide 20 mg/L + humic acid 5% 2.043 1.296 0.143 3.339 3.482
L.S.D. at 5% 0.42 0.71 0.10 1.03 0.94