Breeding ecology of upland birds in no-tillage and tilled cropland / Nancy Starks Basore.
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TextPublication details: Ames, IA : Iowa State University, 1984.Description: 64 leaves ; 28 cmOnline resources: Abstract: The nesting ecology of upland birds was studied in 355 ha of no-tillage and 129 ha of tilled cropland. No-tillage treatments included corn planted into corn residue, corn planted into sod residue, and soybeans planted into corn residue. A fourth treatment, used for comparison, was corn planted into tilled cropland. No-tillage farming leaves more residue on the field surface, providing nesting sites for ground nesting birds. Twelve species (excluding brown-headed cowbirds), with an average nesting density of 36 nests/100 ha nested in no-tillage fields; only 3 species with an average density of 4 nests/ 100 ha nested in tilled fields. Nests in no-tillage fields were placed in crop residue that was shorter but of similar coverage to that in the no-tillage fileds overall. Nests in tilled fields were positioned in areas where crop residue was concentrated but of a similar height to that in fields.Twenty-two percent of the crop-field nests were successful, 54% were lost to predators, and l
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Thesis(M.S.)--Iowa State University, 1984.
The nesting ecology of upland birds was studied in 355 ha of no-tillage and 129 ha of tilled cropland. No-tillage treatments included corn planted into corn residue, corn planted into sod residue, and soybeans planted into corn residue. A fourth treatment, used for comparison, was corn planted into tilled cropland. No-tillage farming leaves more residue on the field surface, providing nesting sites for ground nesting birds. Twelve species (excluding brown-headed cowbirds), with an average nesting density of 36 nests/100 ha nested in no-tillage fields; only 3 species with an average density of 4 nests/ 100 ha nested in tilled fields. Nests in no-tillage fields were placed in crop residue that was shorter but of similar coverage to that in the no-tillage fileds overall. Nests in tilled fields were positioned in areas where crop residue was concentrated but of a similar height to that in fields.Twenty-two percent of the crop-field nests were successful, 54% were lost to predators, and l