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Search results with tag "Wetland management for waterfowl handbook"
Wetland Management For Waterfowl Handbook - USDA
www.nrcs.usda.govDUCK-USE DAYS In comparing the amount and/or quality of forage available to waterfowl in various habitat types, biologists and managers often use the term duck-use days, of DUD. Assuming that the ducks are mallard size and that daily temperatures are thirty to seventy