<P> Traditionally , chicken production was distributed across the entire agricultural sector . In the 20th century , it gradually moved closer to major cities to take advantage of lower shipping costs . This had the undesirable side effect of turning the chicken manure from a valuable fertilizer that could be used profitably on local farms to an unwanted byproduct . This trend may be reversing itself due to higher disposal costs on the one hand and higher fertilizer prices on the other , making farm regions attractive once more . </P>
<P> Traditionally , chicken production was distributed across the entire agricultural sector . In the 20th century , it gradually moved closer to major cities to take advantage of lower shipping costs . This had the undesirable side effect of turning the chicken manure from a valuable fertilizer that could be used profitably on local farms to an unwanted byproduct . This trend may be reversing itself due to higher disposal costs on the one hand and higher fertilizer prices on the other , making farm regions attractive once more . </P>
where does most of the chicken in the us come from
where does most of the chicken in the us come from
closer to major cities
closer to major cities