When referring in English to the dominant agricultural system in the southern US pre-1865, one typically says something like "plantation slavery," and reasonably-educated people "know what you're talking about"--estates with very large spatial extents and chattel-slave populations growing cash crops. Similarly, one can use the term "hacienda system" to refer to similar operations in Latin America (both before and after abolition of slavery), or "latifundia" for ancient Rome.
Is there a term widely used to refer to the serf-operated, large-estate system of the Russian grainbelt before the 1861 abolition? I sometimes see references to obshchina and mir, but IIUC (1) those are governing structures, and (2) even a relatively small estate would have several mir.