Private farms are equivalent to family farms or hobby farms that raise and produce animals and/or plants without relying on corporate funding. "Private farms" can be considered farms that don't feel the need to advertise their business to the public, or that are family-owned and run or run by a sole proprietorship. It should be noted though that most farms are not exactly private farms since they are influenced by the public through what the public (being comprised of consumers) chooses to consume that comes off the farm, be it a small family farm, or a large corporate farm.
In which country?
Private held company
Capitalism
When Stalin was in full control of the Soviet Union he revived the once failed attempt to collectivize private farms into government owned and operated farmlands.
Stay laws
That is correct. Collectivization of Russian farms began with the Bolshevik revolution in 1917, and expanded to the rest of the Soviet bloc following WW II. With the collapse of the USSR in 1990, private ownership returned.
The USSR did while Stalin was in charge.
There are always farms for sale. You just need to keep your eyes open and look either in a local newspaper's classifieds or at a realtor's office. Some farmers won't be selling through a newspaper ad or a realtor, but more private.
Organic farms, commercial farms, "factory" farms, grain farms, ranches, chicken farms, pig farms, dairy farms, beef farms, bison ranches, etc.
Cattle farms, gator farms, pig farms, chicken farms, horse farms, etc.
either state farms, consumer farms, corporate owned farms, or family owned farms
Truck farms,horse farms,hog farms,dairy farms (cow & goat),cash crop,fish farms,ect. geterdone!