Number of birds counted per hectare per day on ROW and forest sample units for the 6-day census in July, 1982.
| Census date July | Number of birds per hectare | ||
|---|---|---|---|
| ROW-herbicide | ROW-handcut | Adjoining forest | |
| 12 | 5.7 | 4.7 | 3.1 |
| 13 | 8.4 | 5.7 | 5.0 |
| 14 | 6.8 | 5.6 | 3.1 |
| 15 | 6.3 | 7.1 | 2.9 |
| 16 | 6.5 | 4.9 | 3.4 |
| 17 | 4.8 | 4.8 | 2.8 |
| Mean | 6.4 | 5.5 | 3.4 |
| Std. Dev. | 1.2 | 0.9 | 0.8 |