What characterizes the perimeter watering system?

The perimeter watering system is characterized by watering from below, which allows for the upper foliage of the plants to remain dry. This method is particularly beneficial as it reduces the likelihood of fungal diseases that often thrive in wet conditions on leaves. Keeping the foliage dry also minimizes water evaporation from the leaves, allowing for more efficient water usage and healthier plant growth. The system may involve techniques such as drip irrigation or soaker hoses positioned strategically around the perimeter to ensure that roots receive the necessary moisture without getting the above-ground parts of the plant wet.

The other options discuss aspects such as constant water flow, overhead application, and labor intensity, which do not accurately describe the primary characteristic of the perimeter watering system. This system focuses on efficient and targeted watering at the root level, distinguishing it from methods that apply water overhead or require higher labor inputs for maintenance.