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adopted for the Buckeye Ranch (Table 14). Moist-soil management simulates natural drying conditions by artificially drawing down water levels in spring and summer. The exposed soils allow for the germination of seeds. Different species of plants respond to the timing of drawdowns and the stage of plant succession. Slow drawn-downs, for example, result in a greater mosaic of vegetation types than fast drawdowns. During the early phases of implementing moist-soil management, annual plants predominate, whereas perennials likely would become dominant after several years of plant succession. Control of undesirable vegetation is best achieved by controlling water levels to flood or dry out undesirable plant species. The ability to completely remove water from an area is absolutely necessary to control plant succession and may require disturbance to alter conditions. Burning can be used to set back or keep certain kinds of vegetation at a desired stage. Mechanical control of vegetation can be achieved by drying or draining the marsh and then disking, plowing, or mowing. Afterwards, the marsh may be re-flooded to eliminate a particular target species, such as cocklebur. If all other methods fail or are uneconomical, the method of last resort would be the use of herbicides to suppress particular target species. Planned management regime for the South Tracy Lake seasonal wetlands will allow for prolonged availability of this habitat type to a variety of waterbirds and other wildlife. Under current hydrologic patterns the lake is available to waterfowl and shorebirds, as a foraging site for only 3 months each year. By drawing down the lake to 12 feet msl by mid-April, most of the arms of the lake will become usable by a variety of species (water depths will vary from 2 feet to edge). Water levels behind the proposed dikes will begin to quickly evaporate,drying by the end of May. Planned moist soil management through Buckeye Ranch Resource Plan (November, 1993) 190