Certified Crop Advisor Practice Exam

What is the function of a soil amendment?

1. To reduce crop yields

2. To promote soil structure

3. To increase chemical runoff

4. To decrease nutrient availability

The correct answer is: To promote soil structure

The function of a soil amendment primarily involves promoting soil structure. Soil amendments are materials added to soil to enhance its physical properties, including aeration, drainage, water retention, and overall soil structure. By improving soil structure, amendments help create a better environment for roots, allowing for enhanced nutrient and water uptake by plants. A well-structured soil enables better penetration of air and water, which is essential for healthy root development and increased biological activity within the soil ecosystem. This improved condition supports higher crop yields and contributes positively to the overall health of the soil, making it more resilient to erosion and degradation. Understanding the role of soil amendments in promoting soil structure is crucial for effective crop management and sustainable agricultural practices. The benefits they offer play a significant role in fostering an environment conducive to plant growth, rather than inhibiting it or degrading soil quality, as suggested by some of the other options.