Final answer:
Oligarchy does not belong to the set as it is a form of governance, unlike the other terms which are related to agricultural practices or policies intended to address issues in agriculture and land distribution.
Step-by-step explanation:
In assessing which one does not belong to the set: latifundium, land reform, poverty, oligarchy, monoculture, we should consider what each term represents in the context of agriculture and societal structures. A latifundium refers to a very large landed estate, particularly those seen in the context of historic Latin America which were often associated with poor working conditions and inequality. Land reform is a measure or policy implemented to redistribute land, typically to alleviate the issues caused by large estates like latifundia and to address poverty by allowing more equitable access to land. Oligarchy stands out because it is a form of government or societal structure where power resides in the hands of a small number of people, whereas the other terms directly pertain to agricultural practices or objectives to reform them. Lastly, monoculture refers to the agriculture practice of growing a single crop or plant species over a wide area and for a large number of consecutive years, which can lead to environmental issues and economic instability.