Which of the following factors can increase agricultural yield?

Proper crop rotation is a crucial practice for increasing agricultural yield. This method involves alternating the types of crops grown on a particular piece of land in sequential seasons. By doing so, it helps to maintain soil fertility, reduce soil erosion, and break cycles of pests and diseases. Different crops have varying nutrient requirements and pest pressures, so rotating them can restore nutrients to the soil and disrupt the life cycles of crop-specific pests. As a result, this practice leads to healthier soil and can substantially improve overall crop productivity and yields.

In contrast, excessive irrigation can lead to waterlogging, soil salinity, and depletion of local water resources, all of which can negatively impact crop health. Neglecting pest management allows pests and diseases to thrive, which can directly diminish plant health and yields. Planting too densely can lead to competition for light, nutrients, and water among plants, often resulting in reduced growth and lower yields. Therefore, proper crop rotation stands out as a practice that directly enhances agricultural productivity.