By Raymond C. Loehr
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Extra resources for Agricultural Waste Management: Problems, Processes and Approaches
A N a t i o n a l P r o g r a m of Research for E n v i r o n m e n t a l Quality—Pollution in Relation to Agriculture a n d F o r e s t r y . " Joint T a s k F o r c e of the U . S . D e p t . of Agriculture and the State Universities a n d L a n d G r a n t Colleges, W a s h i n g t o n , D . C . , 1968. 5. F r e e m a n , O. F . , a n d Bennett, I. , " A R e p o r t to the P r e s i d e n t — C o n t r o l of A g r i c u l t u r e Related P o l l u t i o n . " U . S . D e p a r t m e n t of Agriculture a n d the Office of Science a n d Tech nology, W a s h i n g t o n , D .
The number of cattle on feed for slaughter was over 13 million head in 1970, an increase of 73% in the previous decade. During this period, the number of cattle on feed in the United States increased at the rate of over one-half million head per year. Since midcentury, commercial feedlot operations in which feed and water are brought to the animals in confined areas have been expanding rapidly. Beef cattle enter such feedlots weighing 600-800 lb, are fed a ration high in grain and protein concentrate, and gain about 2 - 3 lb per day.
Mechanical harvesting of potatoes (courtesy U . S . D e p t . of Agriculture). Frozen fish products are increasing in popularity and a 150% increase has been predicted in the next 15 years. The annual United States per capita consumption of seafood has been about 11 lb per year for the past 20 years. The major geographic seafood production regions in waters adjacent to the United States are those of the Gulf states, South Atlantic and Chesapeake Bay states, North and Middle Atlantic states, California, Alaska, and Oregon and Washington.
Agricultural Waste Management: Problems, Processes and Approaches by Raymond C. Loehr