Sample Clues
Fed to livestock, it's the USA's most widely produced feed grain, grown on more than 400,000 farms
corn
The hormone bovine somatotropin is used to increase the production of this
milk
Being brought to the U.S. by a ship docking at San Francisco in 1851 helped lead to it now being a major crop in the Midwest
soybeans
This grain, threshed & unhulled, is called paddy
rice
In the 1930s, Pan Am grew vegetables on Wake Island for passengers by using this soilless method
hydroponics