New York agricultural experiment-station

Hawaii Agricultural Experiment Station

Arkansas Agricultural Experiment Station

The Connecticut Agricultural Experiment Station

The Kentucky Agricultural Experiment Station

Maine Agricultural and Forest Experiment Station

ACKNOWLEDGMENTS The authors wish to acknowledge input from Gary Hunt and Jonathan Rubin, who are members of David Lewis's thesis committee. In addition, David Field, Thomas Power, and especially Gary Hunt provided helpful comments on an earlier version of this bulletin. David Lewis is appreciative of financial support for his graduate studies provided by the University of Maine Graduate Assista...