...I am not sure any such research has been done that addresses the effects of inter-species competition between deer and turkeys in regards to diet...deer and turkeys may eat some of the same food items but they do have different feeding habits...not to mention that few animals that learn to eat corn or beans, such as turkey and deer have, ever starve in Iowa...also, if you look at the last 20 years both the turkey population and the deer population in Iowa have increased...in some areas both have increased dramatically...