I hope someone will tell me what "soybean feed grains" in the following
sentence. It's a part of an article by Reuters on genetically engineering
The company already has successfully commercialized Roundup Ready corn and
soybean feed grains and had hoped to spread its herbicide-resistant
technology in the vast wheat-growing industry.
Is "soybean feed grains" a compound noun?
Is "feed" an adjective or a noun?