Claim: Coca is grown in farms.

A cash crop is an agricultural crop which is grown for sale to return a profit . It is typically purchased by parties separate from a farm . The term is used to differentiate marketed crops from subsistence crops , which are those fed to the producer 's own livestock or grown as food for the producer 's family . In earlier times cash crops were usually only a small -LRB- but vital -RRB- part of a farm 's total yield , while today , especially in developed countries , almost all crops are mainly grown for revenue . In the least developed countries , cash crops are usually crops which attract demand in more developed nations , and hence have some export value .   Prices for major cash crops are set in commodity markets with global scope , with some local variation -LRB- termed as `` basis '' -RRB- based on freight costs and local supply and demand balance . A consequence of this is that a nation , region , or individual producer relying on such a crop may suffer low prices should a bumper crop elsewhere lead to excess supply on the global markets . This system has been criticized by traditional farmers . Coffee is an example of a product that has been susceptible to significant commodity futures price variations .  __ TOC __