The phrase "cash crop" refers to a type of plant or crop that is grown primarily to be sold for money, rather than for personal consumption. Full definition
Such breeding facilities treat puppies as cash crops instead of pets, employing horrendous standards of care for the dogs and producing sick animals prone to illness, injury, genetic and behavioral problems. (thepuppymillproject.org)
In addition to carbon earnings, farmers also benefit from cash crops from their trees, improved food and fuel security, improved soil quality, and reduced soil erosion. (prweb.com)