Certified Crop Advisor Practice Exam

Which kind of soil structure would be typical for a good seed bed?

1. platy

2. granular

3. blocky

4. massive

The correct answer is: granular

A granular soil structure is considered ideal for a good seed bed because it promotes optimal conditions for seed germination and root development. Granular soils consist of small, rounded aggregates that create a well-aerated environment, allowing for adequate movement of air and water. This structure encourages healthy root growth by ensuring that roots can easily penetrate the soil and access nutrients and moisture. In contrast, platy structure can hinder seedling growth due to its thin, flat aggregates that can create physical barriers to root penetration and reduce water infiltration. Blocky structures, while generally positive, may not provide the same level of pore space and aeration as granular structures. Massive soil, with its lack of distinct aggregates, can lead to compaction, poor drainage, and limited root development, making it unsuitable for establishing a good seed bed. Therefore, granular structure stands out as the best choice for creating favorable conditions for seeds to thrive.