During the agricultural revolution in 1700s wealthy landowners increased food production by?

By enclosing farmlands into large fields.

Before the agricultural revolution, agriculture in Europe was largely based on small-scale subsistence farming, with common fields farmed by individual households. During the 18th century, wealthy landowners began to enclose common lands and consolidate them into large, single-unit fields, a process known as enclosure. Enclosure had a significant impact on food production. It enabled farmers to control the timing of planting and harvesting, use new agricultural techniques such as crop rotation, and increase their use of fertilizers. These changes led to increased agricultural productivity and contributed directly to the rise of towns and industrialization.