Final answer:
The correct term for agriculture that uses machinery to cultivate large parcels of land is industrial agriculture, which is a key aspect of conventional farming.
Step-by-step explanation:
The term used to describe agriculture where large parcels of land are cultivated using machinery instead of manual labor is industrial agriculture. This form of agriculture is part of what's commonly referred to as conventional farming or modern agriculture. Industrial agriculture relies on large investments in mechanized equipment which is predominantly powered by fossil fuels. This approach has made agriculture efficient and allowed food production worldwide to rise significantly in recent decades. To provide a contrast subsistence agriculture is carried out mainly for the farmer's own nourishment rather than for sale and sustainable agriculture aims to meet society's food and textile needs without compromising future generations.
Meanwhile organic agriculture focuses on promoting and enhancing biodiversity, biological cycles and soil biological activity without using synthetic fertilizers and pesticides.