. Bulletin. Natural history; Natural history. Aug. 1979 Bellrose et al.: Waterfowl and the Changing Illinois Valley 43 kill by private clubs in the Illinois River valley (Bellrose 1944). It became necessary for chicle clubs to develop al- ternative sources of duck food if they were to continue to enjoy a semblance of quality hunting. Although waste corn left after harvest by mechanical pickers temporarily filled the food re- cjuirements of mallards, their field feed- ing was not necessarily conducive to good hunting in bottomland lake habitats. Consequently, in the late I930's the more alert a
. Bulletin. Natural history; Natural history. Aug. 1979 Bellrose et al.: Waterfowl and the Changing Illinois Valley 43 kill by private clubs in the Illinois River valley (Bellrose 1944). It became necessary for chicle clubs to develop al- ternative sources of duck food if they were to continue to enjoy a semblance of quality hunting. Although waste corn left after harvest by mechanical pickers temporarily filled the food re- cjuirements of mallards, their field feed- ing was not necessarily conducive to good hunting in bottomland lake habitats. Consequently, in the late I930's the more alert and affluent duck clubs be- gan constructing levees to provide ad- equate water control, the key to in- creasing the growth of waterfowl food plants. World War II interrupted this development, but in subsequent years more and more tracts of bottomland have been brought under some degree of low-water control. A questionnaire sent in September 1978 to 219 duck clubs in the Illinois Valley [those of the 252 clubs owning more than 16 ha (40 acres)] elicited in- formation on impoiuided areas. About one-third of the lands controlled by private clubs have levees or other structures that permit a degree of wa- ter control (Table 17). The heights of the levees, as reported in the question-. Fig. 25.—Beds of Japanese millet sown from a light aircraft on mud flats by a duck club to attract waterfowl. To make seeds available for dabbling ducks, millet beds are flooded dur- ing the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
