Effects of two haying provisions on duck nesting in conservation reserve program (CRP) fields in South Dakota / Kent A. Luttschwager.
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TextPublication details: Brookings, SD : South Dakota State University, 1991.Description: ix, 51 leaves : ill. ; 28 cmOnline resources: Abstract: Duck nesting in Conservation Reserve Program (CRP) fields was evaluated in 1989 and 1990 to determine the post-year effects of emergency haying.Due to severe drought some CRP fields were released in 1988 for emergency haying with the provision that 10% be left in idled strips and some fields were released in 1989 with the provision that 25% be left in idled blocks. Visual obstruction readings were used to index vegetation height-density. A cable- chain drag was used to find duck nests, and flush ring-necked pheasants (Phasianus colchicus) and white-tailed deer (Odocoileus virginianus) in 27 CRP fields in 5 eastern South Dakota counties. Duck nesting data in hayed and idled strips, hayed and idled blocks, and idled fields (not released for haying) were used to evaluate post-year haying effects on duck nest density and success. In 1989 mean residual and mean peak green growth vegetation visual obstruction readings in idled strips were significantly greater (P<0.05) than hayed strips. N
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Thesis(M.S.)--South Dakota State University, 1991.
Includes bibliographical references (leaves 46-51).
Duck nesting in Conservation Reserve Program (CRP) fields was evaluated in 1989 and 1990 to determine the post-year effects of emergency haying.Due to severe drought some CRP fields were released in 1988 for emergency haying with the provision that 10% be left in idled strips and some fields were released in 1989 with the provision that 25% be left in idled blocks. Visual obstruction readings were used to index vegetation height-density. A cable- chain drag was used to find duck nests, and flush ring-necked pheasants (Phasianus colchicus) and white-tailed deer (Odocoileus virginianus) in 27 CRP fields in 5 eastern South Dakota counties. Duck nesting data in hayed and idled strips, hayed and idled blocks, and idled fields (not released for haying) were used to evaluate post-year haying effects on duck nest density and success. In 1989 mean residual and mean peak green growth vegetation visual obstruction readings in idled strips were significantly greater (P<0.05) than hayed strips. N