A master's thesis was discussed in the College of Education, Qurna, Department of Life Sciences, University of Basra (Addition of nano-zinc oxide and Acadian seaweed extract in the physiological and anatomical characteristics and the effective components of the watercress plant, Eruca sativa Mill) by researcher Ruqaya Abdel Moneim Kazem in the central hall of the College of Education, Qurna.

 The study dealt with fifteen working treatments, which are combinations between five treatments, which are the control treatment (distilled water only), nano-zinc oxide with two concentrations of 75 and 150 mg.l, and the Acadian seaweed extract with two concentrations of 1000 and 2000 mg.l., and three methods of addition are seed soaking, foliar spraying and Watering and concentrations above

 The results showed that the plants treated with Acadian seaweed extract, especially a concentration of 2000 mg.L, led to a significant increase in the studied characteristics, and this may be attributed to the components of the extract from plant hormones, amino acids and many nutrients, and that zinc nanoparticles caused a significant difference in the characteristics. The study concluded, and the results showed that the foliar spray method was the best, and it may be more effective and efficient than other application methods, and that the rate of nutrient absorption increases when spraying is used.