Merino sheep produce the most valuable wool. Australia produces about 42% of merino wool.
Fine wool is produced by the US by four breeds of sheep: Delaine-merino , Rambouillet, Debouillet and Targhee. The majority of this wool is produced in Texas and California.
The greatest share of US wool production is of medium grade wools removed from the animals raised for meat. Their wools is mostly used for carpeting because of their high resiliency and great abrasion resistance.
Sheep are typically sheared once a year. They can also be fed a chemical additive or injected with a chemical that causes the sheep’s wools to become brittle and can be pulled off within a week or so. These methods decrease shearing costs.