Large companies can influence Congress, and some fear that the fewer companies there are in a given sector, the more likely they are to get their way.
To understand the significance of corporate changes, you have to go back a century to look at how the industry got to where it is today.
The prospect of fewer, larger companies controlling so much of the basic food supply is giving some farmers and anti-trust advocates heartburn.
Supporters and opponents of several proposed mergers among agricultural seed and chemical companies are making their case to lawmakers in Washington.
The U.S. Senate Judiciary Committee plans to examine proposed mergers among agricultural chemical and seed companies in a September hearing.
Over the past century, small-town seed businesses have given way to global enterprises. How a small seed company in Nebraska helps explain the transformation.
Hundreds of lawsuits against seed company Syngenta could develop into a major class-action, potentially involving almost every corn farmer in the country.
After months of negotiations, Monsanto announced on Wednesday that it would not try to purchase competitor Syngenta.
In the past few years, Monsanto has purchased weather analysis companies and big data firms. The company now wants to buy the Swiss chemical company, Syngenta.
In an effort to make the world's largest seed and pesticide company, Monsanto has offered to buy Syngenta. But the Swiss company isn't accepting -- yet.
Bees have been dying worldwide, causing concern for global food supply. This week, the EU has taken a step to protect the bees from pesticides.