APPLIED ECOLOGY 





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Fig. 184. A power-dam lake at the edge of a town in Minnesota as it 

 appeared in 1926 when it was extensively used for fishing and recreation. By 

 1936 excessive silting had left only a small channel. Watersheds above the 

 dam were improperly handled; timber was removed, slopes were cultivated 

 and few precautions were taken to prevent erosion.-L/. 5. Soil Conservation 

 Service. 



