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Bird Use and Nesting in Conventional,
Minimum-tillage, and Organic Cropland

Table 2


Table 2: Back-transformed mean density of birds/10 ha on conventional, minimum-tillage, and organic fields in fallow, sunflower, and wheat during spring, fall and winter in southeastern North Dakota, 1991-93.
Season
Crop
Conventional Min-till Organic Mean
Springa
Fallow 12 22ABC 2A 12
Sunflower 15 1B 15 1
Wheat 3 3C 4 3
Mean 1 9 7  
Fall
Fallow 11 17 13 14
Sunflower 42 11 12 22
Wheat 4 5 11 7
Mean 19 11 12  
Winter
Fallow 3 3 3 3
Sunflower 2 1 6 3
Wheat 1 2 2 2
Mean 2 2 4  
aNumbers in a row or a column followed by the same letter differ within season <P ≤ 0.05).


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