A master’s thesis at the College of Agriculture at Karbala University examined the effect of spraying with NPK and humic acid on the growth of sunflower yield. The thesis entitled (The Effect of Spraying with Nutrients (20:20:20) and Humic Dubalic Acid on the Growth of Sunflower Yield) by Hazem Kazem Aziz, included five chapters, which are the introduction, materials, working methods, results and discussion, as well as conclusions and recommendations. Knowing the effect of spraying with the nutritious (NPK) and humic acid on the growth of the sunflower yield and studying the interaction between them and its reflection on some characteristics. deficiency in the soil.
