Which of the following is a benefit of hydroponics in greenhouse management?

The correct answer highlights a significant advantage of hydroponics in greenhouse management: higher water efficiency and reduced soil-borne diseases. Hydroponics utilizes nutrient-rich water solutions to grow plants without soil, which markedly improves water efficiency compared to traditional soil farming. This method allows for precise control over the water and nutrient supply, reducing excess usage and runoff, which is crucial in managing water resources sustainably.

Additionally, by eliminating soil from the growing medium, hydroponics significantly reduces the risk of soil-borne diseases that can adversely affect plant health. In a soil-less system, pathogens typically found in the soil—such as root rot or nematodes—are not a threat, allowing for healthier crops and potentially higher yields. This way, growers can achieve more consistent and predictable results while minimizing the need for chemical pesticides that are often required to manage soil-related diseases.

The other choices do not reflect the benefits of hydroponics. Increased pest problems and higher dependence on soil quality are generally challenges associated with traditional soil-based agriculture, while less control over crop diseases contradicts the advantages offered by hydroponic systems.