The system of farming which involves the use of a large hectare of land planted with economic crops is known as

Step 1: Analyze the question The question asks for the farming system that uses a large hectare of land planted with economic (cash) crops. The key phrases are "large land area" and "economic crops."

Step 2: Explain the concepts

• Cooperative farming: Farmers pool resources, land, or labour and work together, often sharing the benefits. It is not defined by one huge piece of land.
• Mechanized farming: Uses machines such as tractors and harvesters. It is defined by the tools used, not the crop or the land size.
• Peasant farming: Small plots, simple tools, and mostly subsistence production.
• Plantation farming: A very large farm devoted to a single cash or economic crop such as oil palm, rubber, cocoa, or tea. It usually has heavy capital investment, a large labour force, and often processing facilities. Examples in Nigeria include the rubber plantations at Okomu in Edo State and the oil palm plantations in the Niger Delta.
• Tree planting: Planting trees, usually for reforestation or environmental protection. It does not necessarily involve economic crops on a large scale.

Step 3: Match the description to the options "A large hectare of land" and "economic crops" point to plantation farming. Only plantation farming is defined by large-scale cultivation of a cash crop, usually a single one, on a big area of land.

Answer: D. Plantation farming

Exam tip: Link "plantation" with "large land + one cash crop" (cocoa, rubber, oil palm). Link "peasant" with "small land + subsistence," and "mechanized" with "machines."