RCB repeated at more than one location
- Blocks are laid out at more than one location. Treatments
are assigned at random to those blocks as below.
- Treatments are assigned at random within blocks of adjacent subjects, each treatment once per
- The number of blocks is the number of replications.
- Any treatment can be adjacent to any other treatment, but not to the same treatment within the block.
Different colors represent different treatments or locations. Blocks are delineated. There are 3 treatments, 3 locations and 3 blocks per location in this example.
Location 1 Location 2
Block I II III Block I II III
A B C B C B
B A B A B C
C C A C A A
Block I II III
A C A
C B C
B A B
ANOVA table format:
|Error for Locations (El)
|Treatments X Locations (TxL)
|awhere l=number of locations, t=number of treatments and b=number of blocks or replications.|
Sample ANOVA table:
|Error for Locations
|Treatments X Locations
|aF test with 2,6 degrees of freedom at P=0.05 is 5.14; 2,12 is 3.89; 4,12 is 3.26|
Sample SAS GLM statements:
CLASS LOCS BLOCKS TREATS;
MODEL WHATEVER = LOCS BLOCKS(LOCS) TREATS
TEST H = LOCS E = BLOCKS(LOCS);
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July 7, 2000