Certified Crop Advisor Practice Exam

Sandy soils have greater __________ than clay loam soils, impacting yield potential.

1. Water retention

2. Drouth potential

3. Nutrient availability

4. Organic matter

The correct answer is: Drouth potential

Sandy soils have greater drouth potential compared to clay loam soils. This characteristic is primarily due to the texture and structure of sandy soils, which have larger particles and fewer fine particles. As a result, sandy soils drain quickly and do not hold moisture effectively. This rapid drainage can lead to increased drought susceptibility, especially in periods of low rainfall, impacting the yield potential of crops grown in these soils. In contrast to sandy soils, clay loam soils have smaller particles that provide higher water retention capacity. They can hold moisture better, which is critical for plant growth and can enhance yield potential even in drier conditions. Additionally, clay loam soils typically have more organic matter and a better nutrient-holding capacity, contributing to improved crop performance. Understanding these characteristics is crucial for farmers and agronomists when selecting crops and managing irrigation practices to optimize their yield potential in different soil types.