S: (n) cash crop (a readily salable crop that is grown and gathered for the market (as vegetables or cotton or tobacco))
S: (n) catch crop (a crop that grows quickly (e.g. lettuce) and can be planted between two regular crops grown in successive seasons or between two rows of crops in the same season)
S: (n) cover crop (crop planted to prevent soil erosion and provide green manure)
S: (n) field crop (a crop (other than fruits or vegetables) that is grown for agricultural purposes) "cotton, hay, and grain are field crops"
S: (n) root crop (crop grown for its enlarged roots: e.g. beets; potatoes; turnips)