Farmers who had large farms, but only grew one crop.

Monoculture is the agricultural practice of producing or growing a single crop, plant, or livestock species, variety, or breed in a field or farming system at a time. Polyculture, where more than one crop is grown in the same space at the same time, is the alternative to monoculture.

The demand for tobacco in Europe The demand for more subsistence crops The demand for the shipbuilding trade The demand for more fish in the colonies.