Northern Prairie Wildlife Research Center
Table 3: Back-transformed mean density of birds/10 ha in summer on conventional, minimum-tillage, and organic fields in fallow, sunflower, and wheat in southeastern North Dakota during 1991-93. a
| Year | Conventional | Minimum-till | Organic |
| 1991 | 11 | 20 | 10 |
| 1992 | 11 | 11 | 12 |
| 1993 | 11 | 10 | 9 |
| Mean | 11 | 11 | 10 |
| Year | Fallow | Sunflower | Wheat |
| 1991 | 14 | 16EF | 10 |
| 1992 | 23AB | 7AE | 6B |
| 1993 | 15C | 6CDF | 10D |
| Mean | 17 | 9 | 9 |
| aNumbers in a row or a column followed by the same letter differ (P ≤ 0.05). | |||
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/birduse/table3.htm
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