Agronomy Degree Practice Exam

What characterizes a fibrous root system?

1. One primary tap root

2. Multiple small roots

3. Deep-rooted system

4. Roots that reach a significant depth

The correct answer is: Multiple small roots

A fibrous root system is characterized by multiple small roots that emerge from the base of the plant. This type of root system typically includes numerous thin roots that spread out horizontally and can form a dense mat just below the surface of the soil. The fibrous roots are generally shallow, allowing the plant to effectively stabilize the soil and absorb moisture and nutrients from the upper layers. In contrast, a taproot system, which features a single primary root that grows deep into the soil, is indicated by options that suggest deep-rooting or single primary roots. Therefore, the presence of multiple small roots is the defining aspect of a fibrous root system, differentiating it from other types such as taproot systems. This adaptability allows fibrous root systems to thrive in various types of soil environments and contribute to soil structure and health.