Certified Crop Advisor Practice Exam

Which of the following practices is most likely to lead to improved soil structure over time?

1. No-till farming

2. Frequent tillage

3. Rotational grazing

4. Intensive monoculture

The correct answer is: No-till farming

No-till farming is recognized for its ability to significantly improve soil structure over time. This practice minimizes soil disturbance, allowing natural processes to take place that enhance soil aggregation and microbial activity. By leaving the soil undisturbed, earthworms and other organisms can thrive, contributing to the formation of stable soil aggregates, which improve porosity and water infiltration. In contrast, frequent tillage disrupts soil structure, leading to compaction and erosion, while intensive monoculture can deplete soil nutrients and lead to a decline in soil health over time. Rotational grazing, although beneficial for pasture management, is not as directly influential on soil structure as no-till practices. No-till farming fosters a sustainable ecosystem that builds resilience in the soil, making it the most effective choice for improving soil structure over time.