Extensive Field Crops

Cash Crops: These are crops grown for direct sale in the market, rather than for use by the farmer. They're often grown on an extensive scale.

Shifting Cultivation: This is a method where farmers move from one field to another after depleting the soil nutrients. It's related because it involves cultivating large areas of land.

Mechanized Agriculture: This refers to farming practices that use machinery, which is often used in extensive crop farming due to the large area involved.