Abstract
servationists have planted millions of multiflora roses (Rosa multiflora) under the assumption that, among other values, they would increase edge and thereby increase bobwhites. The objective of the present research was to test this belief. The field observations were made during a 6-year period, 1948-54, within the Crab Orchard National Wildlife Refuge in Williamson County on land representative of the better bobwhite range in Illinois. Plantings of shrubs were made on an area of 3,500 a., and a nearby tract of 2,450 a. served as a control. Hunting was not permitted on either area. W. N. Wandell established the project and supervised it during the period of active field work. Most of the data for the period June 1948 to May 1951, were collected by R. K. Stubbs, E. E. Filer, and H. D. Crawley; most of the data for the period from May 1951 to the end of 1954 were collected by R. J. Miller. Acknowledgment is made to the Branch of Wildlife Management Lands, U.S. Bureau of Sport Fisheries and Wildlife, for the opportunity to conduct the investigation on refuge land, for office space, and for other aids. Members of the Crab Orchard Field Trial Club helped with censuses of the bobwhites. T. G. Scott encouraged preparation of the manuscript and provided a final editing; R. E. Yeatter and C. O. Mohr, all of the Illinois Natural History Survey, furnished editorial assistance.
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