Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981
Table 1. Physical characteristics of the Woodworth Study Area.
Table 1. Physical characteristics of the Woodworth Study Area.
| Location | 5 km (3 miles) east of Woodworth, N.Dak. |
| Latitude and longitude | 47° 8' N-99° 15' W Elevation 572 m (1,877 feet) ASL |
| Geographic location | Northern Great Plains prairie pothole region |
| Biogeographic province | Missouri Coteau |
| Topography | Stagnation moraine, knob and kettle |
| Study area size | 12.3 km2 (4.75 square miles), 1,231 ha (3,040 acres) |
| Number of wetland basins | 548 |
| Total area in wetlands | 235.88 ha (582.42 acres) |
| Percent in wetlands | 19% |
| Percent in croplands | 30% |
| Percent in miscellaneous | 3% |
| Percent in native grass | 48% |
| Area in shelterbelts, roads, pens, rights-of way, and headquarters | 42.16 ha (104.10 acres) |
| Density of wetland basins | 72 per square kilometer (28 per square mile) |
| Mean basin area | 0.43 ha (1.06 acres) |
| Area in native grasslands | 587.85 ha (1,451.48 acres) |
| Area in croplands | 365.31 ha (902.0 acres) |
| Soil parent materials | Glacial till |
| Soil primary association | Buse-Barnes |
| Potential natural vegetation | Habitat: Agropyron-stipa |
| Climatic region | Cool temperate subhumid |
| Long-term average annual precipitation | 43.69 cm (17.0 inches) |
| Long-term average annual snowfall | 86.36 cm (33.7 inches) |
| Long-term average annual frost-free period | 120 days |
| Long-term average date of last 2.5 cm of snow cover | 25 March |
| Long-term mean annual terperature | 4° C (40° F) |
| Average depth of frost penetration | 1.5 m (4.9 feet) |
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