From: Blocking and re-arrangement of pots in greenhouse experiments: which approach is more effective?
Design (number of blocks × block size) | Efficiency factor [2] | Average ratiob of | |
---|---|---|---|
error VC across traits | s.e.d. across traits | ||
RCBD | |||
 1 × 20 (1A) | 1 | 1.09 | 1.00 |
α-design | |||
 2 × 10 (1B) | 0.90 | 1.05 | 1.02 |
 2 × 10 (1C) | 0.90 | 0.89 | 0.96 |
 4 × 5 (1D) | 0.75 | 0.81 | 0.97 |
 4 × 5 (1E) | 0.75 | 0.78 | 0.94 |
 4 × 5 (1F) | 0.75 | 0.75 | 0.94 |
 5 × 5 (1G) | 0.68 | 0.70 | 0.94 |
 5 × 5 (1H) | 0.68 | 0.78 | 0.98 |
 5 × 4 (1I) | 0.68 | 0.71 | 0.94 |
 5 × 4 (1J) | 0.68 | 0.63 | 0.91 |
 10 × 2 (1K) | 0.14 | 0.62 | 0.96 |
 10 × 2 (1L) | 0.14 | 0.66 | 0.98 |
Row–column design | |||
 2 × 10 (1M) | – | 0.59 | 1.02 |
 2 × 10 (1N) | 0.63 | 0.60 | 1.02 |
α-design (1B) with spatial error structurea | 0.90 | – | 1.00 |