Yep, except again none of these detail the exports of Soy or Beef to the US. You said USA importation was the cause but it appears that Soy beans too are being exported to Asia not the US.

China buys about 60 percent of soybeans traded globally.

In 2011, China accounted for 43% of Brazilian (top destination) and 25% of Argentinean soy exports

http://wwf.panda.org/what_we_do/footprint/agriculture/soy/fa...

Now would you care to back up your statement

>About 90% of cut Amazon is solely for beef production and soy exports for USA beef production.

Nothing you've supplied comes close to asserting this statement