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Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981

Table 33. Apparent density of upland duck nests (nest per 40.5 ha)
among treatments in habitats by species,
Woodworth Study Area, 1966-81.

Table 33. Apparent density of upland duck nests (nest per 40.5 ha) among treatments in habitats by species, Woodworth Study Area, 1966-81.
Habitat and treatment Ha searched Mallard Gadwall Northern pintail Green-winged teal Blue-winged teal Nortern shoveler American wigeon Lesser scaup Total
Native prairie
Burned 3,279 1.20 2.27 0.60 0.10 9.26 0.73 0.23 0.25 14.65
Grazed 1,273 0.57 2.51 0.70 0.45 10.49 0.60 0.10 0.32 15.70
Idle 902 2.24 4.39 1.17 0.85 16.14 1.17 0.45 0.31 26.73
Seeded cover
Burned 397 2.45 5.92 1.22 0.10 10.92 1.43 0.31 0.41 22.76
Grazed 48 1.69 0.85 0.85 0.0 11.86 0.85 0.0 1.69 17.80
Idle 1,037 7.84 9.75 4.49 0.51 19.78 2.73 0.98 0.20 46.27
Cropland
Standing crop 376 0.40 0.80 0.50 0.0 1.90 0.30 0.0 0.20 4.20
Stubble 285 0.0 0.0 0.30 0.0 0.70 0.0 0.0 0.0 1.00
Mulched stubble 75 0.50 0.50 0.0 0.0 1.60 0.0 0.0 0.0 2.70
Summer fallow 85 1.30 0.0 0.90 0.0 2.60 0.0 0.0 0.40 5.20
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