Abstract
Studies were made of bobwhite quail (Colinus virginianus) populations on 2 exptl. areas from Jan., 1946, to Apr., 1947. Objectives were to learn, by analysis of winter range, some of the principal factors determining winter carrying capacity, and to appraise the early effects of agric. land improvement on quail populations. One of the areas was under a rapid program of land improvement. Reverting idle land on this area to cultivation and conservation farming increased the quail population 106% from the 1st winter to the 2d. Contributing to this was the use of corn and Korean lespedeza (Lespedeza stipulacea) which served as staple winter foods where there was formerly cover, but little food. Good interspersion of Korean lespedeza and fencerow cover was found to be the principal factor determining winter carrying capacity in this section of the state. This factor is also compatible with wise land use and conservation farming in Missouri.

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