The Dean of the College of Agriculture, Hawija, Prof. Dr. Khaled Khalil Ahmed, with the participation of the researcher Sazan Nasih Muhammad, published scientific research on cluster analysis of bread wheat genotypes (Triticum aestivum L) in the journal HIV Nursing. And Ahmed stated, "The study included knowing the effect of spraying three levels of silica fertilizer (0, 2, and 4 ml. liter) for different compositions of bread wheat, using cluster analysis, through which variables are classified in certain ways and arranged into groups to be homogeneous and reduce differences within one group. The study aimed to find out how bread wheat genotypes were distributed using cluster analysis at three levels of silica fertilizer.