Brazil is the seventh-largest economy in the world and has seen significant growth based on commodity exports to China. However, there are signs of weakening as economic growth is projected to come in below 1 percent this year.Here is a recap of some crucial trends in three key economies for the global agricultural market and the U.S. position in that market, especially with the impact of rising interest rates and economic growth on U.S. commodity prices.Brazil is the seventh-largest economy in the world and has seen significant growth based on commodity exports to China. However, there are signs of weakening as economic growth is projected to come in below 1 percent this year. Industrial production has been declining at the fastest rate si...