Distribution of Industrial Farms in the United States and Socioeconomic, Health, and Environmental Characteristics of Counties

Table 1

Clustering of industrial farms in 2002 and 2007.

Categories	2002		2007
	𝐼 value	𝑍-score	𝐼 value	𝑍-score
Cattle farms	0.05	53.13	0.07	69.7
Hog farms	0.13	142.9	0.15	154.99
Chicken farms	0.1	105.65	0.1	108.56