The Faculty of Agriculture discussed a master’s thesis on the study of genetic indicators and cluster analysis under levels of NPK fertilizer for growth, yield and quality characteristics of flax genotypes, Linum usitatissmum L, by student Lama Jalil Jabbar, and supervised by Prof. Dr. Mohamed Ibrahim Mohamed. The thesis included a study of two workers, the worker The first three levels (0, 2.5 and 5 gm liter) of compound fertilizer (N20, P20, K20), which were placed in the main panels, while the twelfth factor genotypes of flax were placed in the secondary panels, as the experiment was applied by designing randomized complete sectors According to the split panels system and with three replications. The study concluded that the use of NPK compound nano fertilizer at a concentration of 5 gm led to superiority in most growth characteristics, yield and its components, as well as its use in genotypes as a basic material for breeding, especially genotypes that are characterized by superior growth traits, yield and its qualitative components.