By Raymond C. Loehr
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Extra resources for Agricultural Waste Management: Problems, Processes and Approaches
Fifty years ago, 37 million more acres were required to feed less than half as many people. In 1940, a farm worker produced enough farm products for nearly 11 persons. In 1971, one farm worker produced enough for 48 persons—over a 300% increase in three decades (Fig. 1). In 1971, only 5% of the national work force was on farms compared to about 40% at the turn of the century. The farm workers are not the only contributors to agricultural production. In contrast to earlier periods, farm power units are produced in factories, repaired by service agencies, Agricultural 19 Productivity 50 1940 1950 I960 1970 YEA R Fig.
Cornell University, Ithaca, N e w Y o r k , 1969. References 45 9. M u r r a y , D . , H o g l u n d , C. , and R i p p e n , A. , ' T h e Dairy F a r m E n t e r p r i s e , " Res. R e p . N o . 45. Michigan State University, East Lansing, 1969. 10. C o n n e m a n , G. , " T o w a r d the Y e a r 1985—Milk P r o d u c t i o n a n d C o n s u m p t i o n , " Spec. Cornell Ser. N o . 1. Cornell University, Ithaca, N e w Y o r k , 1970. 11. Dietrich, R. , Costs and economics of size in T e x a s - O k l a h o m a cattle feedlot operations.
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 . C . , 1969. 6. C o m m i t t e e on Public W o r k s , U . S . H o u s e of Representatives, " L a w s of the U n i t e d States Relating to W a t e r Pollution C o n t r o l a n d E n v i r o n m e n t a l Q u a l i t y .