Answer:
A "collective" is a single farm that has been made up of several nearby individual farms. There were two types of collectives. The "kolkhoz" which was a collective farm where the land was owned by the government but operated by the farmers themselves as they saw fit provided they met their quotas of crops.
The second was the "sovkhoz" which was a collective farm where the land was owned by the government, the farmers were paid employees and the operation of the farm was in the hands of other government employees.