A large farm that grows mainly one crop to sell is called a plantation. Plantations have been existing since the Roman Empire. An example of their plantation is the latifundia. It produces wine and oil for export.
A monoculture is a farm growing one kind of crop. See the related link for details.
cash crop
Uni- Plant Farm
Plantation
Plantations.
when one grows one one type of crop all the time.
A monoculture farm is a farming system where only one type of crop is grown across a large area. This type of farming can lead to problems such as soil depletion, increased susceptibility to pests and diseases, and negative impacts on biodiversity.
A farm that raises more than one type of crop. For instance, a mixed crop farm may have barley, triticale, canola and wheat, or just barley and canola.
When farmers farm only one type of crop at a time!
A large southern crop that grew only one crop
plantation