A Master’s thesis at the College of Agriculture, University of Kirkuk, examined “The Effect of Using Marjoram Leaf Powder and Vitamin E on Productive Traits and Selected Blood Biochemical Parameters in Laying Hens.”
The thesis, submitted by Sirwan Saleh Mohammed, aimed to investigate the effects of adding marjoram leaf powder and vitamin E on the productive performance and selected blood biochemical traits of laying hens.
The study concluded that the treatments resulted in significant improvements in the traits evaluated.
