This research was conducted to study the effectiveness of the
variations of magic latin square design, to reduce the value of the
experimental error, in experiences of microbiological (Lactobacillus
acidophilus), and to improve the activity of ran
dom rectangles as
one source of the variations of magic latin square design.
Where they were conducting a random distribution of (6)
treatments supposed to (36) experimental unit test has repeated the
process of distribution (150) times in order to obtain magic latin
squares realized the conditions which show per treatments once in
the row and once in the column, and once in each rectangle within
the one design.