What is crop rotation and its benefits?

• A. Alternating crops on a field over time to maintain soil fertility, reduce pests, and improve yields
• B. Planting a single crop continuously
• C. Rotating crops overnight to save space
• D. Using crops to rotate pests away

Answer: (A)

Crop rotation is the practice of alternating different crops grown on the same field over time to keep soil healthy, reduce pests and diseases, and improve yields. Different crops use nutrients in different ways, and some crops, like legumes, can even add nutrients back into the soil (for example, fixing nitrogen), which helps future crops have what they need. By not growing the same crop every season, you avoid exhausting the soil of the particular nutrients that crop relies on.

Rotating crops also disrupts the life cycles of pests and diseases that depend on a single crop for survival, which lowers the pressure from those problems without always needing chemical controls. In addition, a mix of crops can improve soil structure and organic matter, reduce erosion, and promote better overall soil health, which supports longer-term productivity.

A practical example is a three-year rotation that might include a legume followed by a cereal, then another crop, spreading nutrient use and pest risks across different plants. In farming practice and geography, rotation helps farmers manage land sustainably, adapt to local soil and climate conditions, and support diverse farm systems.

Continuous monocropping, where the same crop is grown year after year, leads to nutrient depletion and higher pest pressure. The idea of rotating crops overnight or using crops to “rotate pests away” isn’t how rotation works.