It is worth noting that US manufacturing and US agricultural sectors are doing quite well.
http://www.bloomberg.com/news/2010-09-01/ism-index-of-manufacturing-in-u-s-increased-more-than-forecast-in-august.html
http://www.fas.usda.gov/cmp/outlook/2010/August-10/Fy%202011%20Overview.pdf
http://www.nytimes.com/2010/09/01/business/economy/01exports.html
Booming infrastructure spending and consumption growth in emerging markets has a lot to do with it. China, which has limited arable land, is set to become the second biggest importer of US agricultural products.