The College of Agricultural Engineering Sciences at the University of Baghdad discussed a PhD dissertation titled *“The Effect of Humic Acid on the Chemical Behavior of Zinc and Boron in Calcareous Soil and the Growth and Yield of Sunflower”* by Marwan Mahmoud Ouda from the Department of Soil Science and Water Resources.

The study aimed to understand the impact of humic acid on the chemical behavior of zinc and boron in calcareous soil by examining their interactions with various soil components. It also assessed the effect of humic acid on the uptake of major nutrients (K, P, N) and micronutrients (B, Zn) and its influence on sunflower growth and yield.

The researcher recommended using humic acid in agriculture due to its positive effect on nutrient absorption by plant roots, increasing the availability of major nutrients. He also advised adding humic acid along with zinc and boron fertilizers when these nutrients need to be supplemented in the soil.

Congratulations to the student on this achievement and best wishes for continued scientific contributions.

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