EFFECT OF SPRAYING WITH NANO IRON AND ADDING HUMIC ACID ON SOME VEGETATIVE GROWTH TRAITS AND YIELD OF VIGNA RADIATE L.

The study was performed during the spring season 2020 in the fields of the Musayyib Technical Institute to studying the influence of spraying with nano iron and addition of humic acid on some traits of vegetative growth and the yield of a local cultivar of mung bean. The completely randomized block design (RCBD) was applied to perform the experiment with three replicates and two factors: spraying nano iron at a concentration (0, 1, 2, 3 g.L-1) while the second factor, which represents a solution of humic acid, was added directly to the soil at a concentration (0, 25, 50, 100 ml. L-1) and the averages of the results were compared utilizing the values of the least significant difference, and the results were as follows: The nanoiron spraying treatment ( 3 g.L-1) was significantly surpassed and recorded the highest averages for the traits of plant height, number of fruiting branches, number of leaves and their content of chlorophyll, dry weight of vegetative, main stem diameter and number of seeds per pod. The pods number per plant, the total seed yield, and the weight of 100 seeds, which amounted to (60.5 cm, 6.6 branches, 20.1 leaves, 43.7 spad, 18.7 g, 4.6 mm, 9.4 seeds, 32.7 pods, 7.4 g, 962.2 kg.ha(-1), respectively), while the adding humic acid treatment (100 ml.L-1) was surpassed and recorded the highest averages for the above traits, which were (58.7 cm, 6.0 branches, 19.6 leaves, 44.5 spad, 18.9 g, 4.6 mm / 9.2 seeds, 32.4 pods, 7.4 g, 873.1 kg.ha(-1), respectively), as for the interaction combination between the two factors (3 g.L of nano iron + 100 ml.L-1 humic acid), it gave the highest averages for all studied traits..