Georgia Residential Contractor Practice Exam

In serial field systems, what is a critical construction guideline regarding the soil between trenches?

1. It must be enhanced with mulch

2. It must be removed completely

3. It must be left undisturbed

4. It can be compacted

The correct answer is: It must be left undisturbed

In serial field systems, leaving the soil between trenches undisturbed is crucial for various reasons related to soil health and the overall effectiveness of the system. Undisturbed soil maintains its structural integrity, which is vital for supporting plant life and preventing erosion. It also retains its natural ecosystem, including beneficial microorganisms and nutrients that can aid in the growth of crops or plants. When the soil is left undisturbed, it helps in sustaining moisture levels and reducing compaction that can affect water infiltration and root penetration. Compaction in the soil can lead to drainage issues, affecting the performance of the trenches themselves. By not disturbing the soil in this manner, the natural processes of water movement and nutrient exchange are preserved, ultimately promoting a healthier environment for the plants that the system is designed to benefit. Enhancing the soil with mulch, completely removing it, or compacting it would disrupt these vital functions and is not advisable for ensuring an effective serial field system.