The phrase "chiefly produced" is correct and usable in written English.
It can be used to indicate that something is primarily or mainly created or manufactured in a particular way or location.
Example: "The product is chiefly produced in factories located in the region."
Alternatives: "mainly manufactured" or "primarily created."
Silver is another of the state's leading minerals, chiefly produced as a by-product of gold mining.
Its artificial harbour makes it a major port, importing cement, petroleum products, and fertilizer and exporting dairy products and meats, which are chiefly produced in the vicinity and processed within the city.
The company, which has chiefly produced revivals, recently began an unusual residency program for playwrights that guarantees each of them three productions over a five-year period, as well as a $50,000 cash award and health insurance.
A. Spinal fluid, or more properly cerebrospinal fluid, is chiefly produced by a network of veins, called the choroid plexus, that projects in tufted, fringelike folds into the pia mater, the innermost of the three membranes, or meninges, that cover the brain and spinal cord.
Now landlords with as few as 3,000 units are testing the technology, which is chiefly produced by two companies, the Rainmaker Group of Alpharetta, Ga., which sells a program called Rainmaker LRO (for lease rent options); and RealPage Inc., of Carrollton, Tex., which calls its version YieldStar Price Optimizer.
Tequila is produced from the heart of the agave plant, the underground fibrous part known as the pina, which is harvested, crushed, fermented and then distilled into the spirit that gets its name from a town where, in centuries past, it was chiefly produced.
The city is now a service centre for an agricultural area chiefly producing wheat, alfalfa (lucerne), and cattle.
Mardin province, bordered to the south by Syria, is an agricultural area chiefly producing wheat, barley, and sesame.
When occupied by the Arabs (c. 640 ce), it was apparently still a prosperous agricultural region, chiefly producing rice and flax.
There are three major classes of interferons: type I or nonimmune interferons consist chiefly of interferons alpha produced by leukocytes and of interferon beta produced by fibroblasts, although there are several other less important variants; type II or immune interferon is interferon gamma, which is mainly produced by NK cells and T cells; and type III consists of the lambda interferons.
On my last night I saw "Arcadia," Tom Stoppard's much-produced literary detective story, at the Gate, which is known chiefly for producing European and American classics.
