Monsanto's dominance draws antitrust inquiry

The Washington Post reports:

For plants designed in a lab a little more than a decade ago, they've come a long way: Today, the vast majority of the nation's two primary crops grow from seeds genetically altered according to Monsanto company patents.

Ninety-three percent of soybeans. Eighty percent of corn.

The seeds represent "probably the most revolutionary event in grain crops over the last 30 years," said Geno Lowe, a Salisbury, Md., soybean farmer.

But for farmers such as Lowe, prices of the Monsanto-patented seeds have steadily increased, roughly doubling during the past decade, to about $50 for a 50-pound bag of soybean seed, according to seed dealers.

What's stopping someone from competing with Monsanto?