28 A HYPOTHETICAL LAY-OUT OF COMPLETELEY RANDOMIZED DESIGN WITH SIX TREATMENTS AND FOUR REPLICATION 1 4 7 10 13 16 19 22 B F C C E E A F 2 5 8 11 14 17 20 23 E A A A B D F B 3 6 9 12 15 18 21 24 F B D C F E D D