Effect of adding nitrogen and iron on yield components and medicinal materials in corn (Zea mays L)

A field experiment was conducted in autumn and spring seasons for 2020 and 2021, respectively, in one of the private farms in the village of Al-Jilawia, affiliated to the Alexandria district (30 km north of Babylon). The factorial experiment was conducted according to a randomized complete block design (R.C.B.D). The experiment included two factors, namely nitrogen fertilization (added to soil): two batches, three batches, four batches. which sumbylized by (N1, N2, N3). As for the second factor, there are three levels of iron (0, 50, 100 mg.l-1) and which sumbylized by (Fe0, Fe1, Fe2), respectively, and with three replicates. The results gave the following: The level (N3) was significantly excelled on the rest of the levels of nitrogen fertilization and for all studied traits except for the percentage of glucose in the caloric of corn and for the autumn and spring seasons. While the treatment (N1) for the traits of the percentage of glucose in the calorie of yellow corn was significantly excelled on all treatments. As for adding iron as a spray on the leaves, the level (Fe2) excelled for all the studied traits, giving the highest averages for the studied traits for both the autumn and spring seasons. As for the interaction between nitrogen and iron, the combination (N3 X Fe2) excelled giving the highest average for all studied traits and for the autumn and spring seasons.