PREFACE 



This publication is a result of the research program of the 

 Institute of Natural and Environmental Resources. The Institute is a 

 multi-disciplinary group of scientists involved in a coordinated program 

 of research, teaching, and extension. The research effort encompasses 

 investigation of: problems affecting the quality of the environment, 

 economics of agriculture, forest and wildlife resources, the efficient 

 use and conservation of water and soil, and regional and community plan- 

 ning and development. 



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